I85PREP
⌘ K
AB-900 study materials
AB-900 study resources

AB-900 practice questions

One question at a time. Build your AB-900 understanding.

First 50 of 200 questions. Each one lists the choices, the correct answer, and an explanation. The checker at the top of this page saves progress in this browser when it is available.

Continue in the practice tool above to load more questions, 50 at a time.

Question 1Identify the core features and objects of Microsoft 365 services

Which description best defines a Microsoft 365 tenant?

  1. A billing account shared by several unrelated companies
  2. A single shared mailbox that several users can open at once
  3. An organization's dedicated instance of Microsoft cloud services Correct answer.
  4. A collection of enrolled devices managed by compliance policies

Explanation

A tenant is the isolated container created when an organization subscribes to Microsoft cloud services; it holds the organization's users, groups, licenses, and service configuration. Other organizations get their own separate tenants, and objects cannot be shared across them by default.

Question 2Identify the core features and objects of Microsoft 365 services

Which Microsoft 365 service hosts cloud-based mailboxes and calendars?

  1. Exchange Online Correct answer.
  2. SharePoint Online
  3. OneDrive for Business
  4. Microsoft Teams

Explanation

Exchange Online is the messaging service in Microsoft 365 and is where user mailboxes, shared mailboxes, calendars, and distribution groups are hosted in the cloud.

Question 3Identify the core features and objects of Microsoft 365 services

Which object represents an individual identity that can authenticate to Microsoft 365 services?

  1. A mail contact
  2. A security group
  3. A shared mailbox
  4. A user account Correct answer.

Explanation

A user account in Microsoft Entra ID holds the credentials and attributes used to sign in, and it is the object to which licenses and roles are assigned. Mail contacts, groups, and shared mailboxes can receive mail but are not used for interactive sign-in.

Question 4Identify the core features and objects of Microsoft 365 services

Which portal is the primary place to create users and assign licenses across Microsoft 365?

  1. SharePoint admin center
  2. Microsoft Entra admin center
  3. Microsoft 365 admin center Correct answer.
  4. Exchange admin center

Explanation

The Microsoft 365 admin center provides a single place to create users, assign or remove licenses, and review billing and service health across the suite. Service-specific portals focus on settings for one workload.

Question 5Identify the core features and objects of Microsoft 365 services

Which service gives each user personal cloud storage for their own work files?

  1. Microsoft Teams
  2. Exchange Online
  3. OneDrive Correct answer.
  4. SharePoint Online

Explanation

OneDrive for Business provides each licensed user with a personal library for their own files, which also syncs to their devices and is used for sharing with others.

Question 6Identify the core features and objects of Microsoft 365 services

In Microsoft Teams, a channel is created inside which container?

  1. A Microsoft 365 group mailbox
  2. A Viva Engage community
  3. A team Correct answer.
  4. A SharePoint document library

Explanation

Channels are subdivisions of a team where conversations and files are organized; each channel's files are stored in a folder in the team's SharePoint site. A channel cannot exist without a parent team.

Question 7Identify the core features and objects of Microsoft 365 services

Which object is used to send email to many recipients from a single address without giving them access to a shared mailbox?

  1. Distribution group Correct answer.
  2. Shared mailbox
  3. Mail contact
  4. Security group

Explanation

A distribution group is a recipient object that expands to a list of members when mail is sent to it, and it grants no access to the message store. Users who need to read and reply from a common address would instead need a shared mailbox.

Question 8Identify the core features and objects of Microsoft 365 services

What is required before a user can use Microsoft 365 Copilot with organizational work data?

  1. A Power BI Premium capacity per user
  2. An eligible Microsoft 365 license plus a Copilot license Correct answer.
  3. An on-premises Exchange Server
  4. A Windows Server hybrid deployment

Explanation

Microsoft 365 Copilot is sold as an add-on for users who already hold an eligible base Microsoft 365 or Office 365 license. The base license provides access to the work content that Copilot grounds its answers in.

Question 9Identify the core features and objects of Microsoft 365 services

What distinguishes a Microsoft 365 group from a security group?

  1. It can contain only guest accounts
  2. It exists only inside Exchange Online
  3. It provides a shared mailbox, site, and calendar Correct answer.
  4. It cannot be used to grant access to resources

Explanation

A Microsoft 365 group is a collaboration object that provisions a shared mailbox, a SharePoint site, a calendar, and a connected Teams experience for its members. A security group is purely a permission principal and provisions no collaboration resources.

Question 10Identify the core features and objects of Microsoft 365 services

A shared mailbox will remain under 50 GB and needs no archive. What licensing is required for it?

  1. No extra license is needed if the users have their own licenses Correct answer.
  2. One license must be assigned to the shared mailbox itself
  3. An Exchange Online Plan 2 license is always required
  4. An Entra ID P2 license must be assigned to the mailbox

Explanation

A shared mailbox under the 50 GB limit does not require its own license; the people who use it must each have a licensed mailbox to access it. Extra licensing or an archive becomes relevant only when additional storage or features are needed.

Question 11Identify the core features and objects of Microsoft 365 services

An external partner needs to collaborate on files in a team. Which object type should be created for the partner?

  1. A guest user Correct answer.
  2. A shared mailbox
  3. A distribution group
  4. A mail contact

Explanation

A guest user is an external identity that is invited into the tenant's directory and authenticated with its own credentials, which is how external people get access to teams, sites, and files. Other recipient objects only handle mail routing.

Question 12Identify the core features and objects of Microsoft 365 services

Which DNS record is used to verify ownership of a custom domain added to a tenant?

  1. A TXT record Correct answer.
  2. An SRV record
  3. A CNAME record
  4. An MX record

Explanation

When a custom domain is added, the tenant generates a unique value that the organization publishes as a TXT record in public DNS to prove it controls the domain. MX and other records may be added later for service routing, not for proving ownership.

Question 13Identify the core features and objects of Microsoft 365 services

Which Teams channel type limits membership to a subset of the team's members?

  1. Private channel Correct answer.
  2. Standard channel
  3. General channel
  4. Shared channel

Explanation

A private channel has its own membership list drawn from the team, and only those members can see its conversations and files. Standard channels are open to the whole team, and shared channels are designed for people across teams or organizations.

Question 14Identify the core features and objects of Microsoft 365 services

Which SharePoint component is designed to store files with versioning rather than structured rows of data?

  1. A site page
  2. A SharePoint list
  3. A document library Correct answer.
  4. A web part

Explanation

A document library is the SharePoint container built for files, offering versioning, check-in and check-out, and metadata columns. Lists are built for tabular records rather than documents.

Question 15Identify the core features and objects of Microsoft 365 services

Which Microsoft Entra role grants the broadest permissions across all Microsoft 365 services?

  1. Teams administrator
  2. Billing administrator
  3. Global administrator Correct answer.
  4. SharePoint administrator

Explanation

The Global administrator role has access to every administrative feature and setting across the tenant, so it should be assigned sparingly. Workload-specific roles are scoped to a single service and follow least privilege.

Question 16Identify the core features and objects of Microsoft 365 services

A team needs to grant access to an app and must not have an email address. Which group type fits?

  1. Mail-enabled security group
  2. Microsoft 365 group
  3. Security group Correct answer.
  4. Distribution group

Explanation

A security group is a pure permission principal: it is used to grant access to resources and is not mail-enabled, so it has no email address or mailbox. Adding mail capabilities produces either a mail-enabled security group or a Microsoft 365 group.

Question 17Identify the core features and objects of Microsoft 365 services

Which licensing method assigns a license automatically as users join a department group?

  1. Group-based licensing Correct answer.
  2. Direct license assignment
  3. Per-app licensing
  4. License reclamation

Explanation

Group-based licensing assigns licenses to members of a specified group, so users receive or lose licenses as their membership changes. Direct assignment requires an administrator to set each license per user.

Question 18Identify the core features and objects of Microsoft 365 services

Which statement describes a declarative agent in Microsoft 365 Copilot?

  1. A PowerShell script that provisions user accounts
  2. A connector that copies files into SharePoint
  3. A configuration of instructions, knowledge, and actions Correct answer.
  4. A virtual machine that hosts the Copilot models

Explanation

A declarative agent is defined by configuration rather than custom code: it combines instructions, knowledge sources, and optional actions or capabilities, and it runs on the Microsoft 365 Copilot orchestrator.

Question 19Identify the core features and objects of Microsoft 365 services

Which statement describes Microsoft 365 Copilot Chat?

  1. It offers web-grounded chat included with eligible plans Correct answer.
  2. It archives every prompt in a SharePoint library
  3. It requires a Copilot add-on license for every user
  4. It replaces Exchange Online for messaging

Explanation

Microsoft 365 Copilot Chat provides a chat experience grounded in web content for users with eligible Microsoft 365 plans, at no additional add-on cost. Users with a Copilot add-on license get the additional grounding in their work content.

Question 20Identify the core features and objects of Microsoft 365 services

When a user creates a team in Microsoft Teams, which objects are provisioned automatically?

  1. A Viva Engage community and a Stream portal
  2. A Power BI workspace and a Dataverse environment
  3. A Microsoft 365 group, SharePoint site, and mailbox Correct answer.
  4. An Entra ID application and a service principal

Explanation

A team is built on a Microsoft 365 group, so creating one also creates the group, a connected SharePoint site for channel files, and a shared mailbox and calendar for the team. Removing the team affects those dependent objects as well.

Question 21Identify the core features and objects of Microsoft 365 services

Which membership method adds users to a group automatically based on attributes such as department?

  1. Nested security groups
  2. Assigned membership
  3. Dynamic membership rules Correct answer.
  4. Guest invitations

Explanation

Dynamic groups evaluate a membership rule against user or device attributes, so users join or leave as those attributes change. Assigned membership requires an administrator or owner to add each member manually.

Question 22Identify the core features and objects of Microsoft 365 services

A newly created user cannot be assigned a license. Which user property must be set first?

  1. Job title
  2. Usage location Correct answer.
  3. Manager
  4. Department

Explanation

License assignment requires a usage location because service availability and terms vary by country or region. Until that property is populated, the license assignment fails even for a fully created user.

Question 23Identify the core features and objects of Microsoft 365 services

When a Microsoft 365 group is deleted, what happens to its connected SharePoint site by default?

  1. It remains active with no owner assigned
  2. It is moved to another tenant
  3. It is converted into a communication site
  4. It is soft-deleted and can be restored for 30 days Correct answer.

Explanation

Deleting a Microsoft 365 group sends the group and its connected resources, including the SharePoint site, to a soft-deleted state where they can be restored within 30 days. After that period the data is permanently removed.

Question 24Identify the core features and objects of Microsoft 365 services

Which content can Microsoft 365 Copilot use when responding to a user?

  1. Content the user already has permission to access Correct answer.
  2. Public internet content exclusively
  3. All tenant content regardless of the user's permissions
  4. Only content saved on the user's local device

Explanation

Copilot honors the existing permissions model: it retrieves organizational content through Microsoft Graph and surfaces only items the signed-in user is already allowed to see. It does not broaden a user's access to tenant data.

Question 25Identify the core features and objects of Microsoft 365 services

Which offering provides the installed desktop versions of Word, Excel, and PowerPoint?

  1. Exchange Online
  2. Microsoft Viva Engage
  3. Microsoft 365 Apps Correct answer.
  4. SharePoint Online

Explanation

Microsoft 365 Apps is the subscription that delivers the installed productivity applications on Windows and Mac devices. The other services are cloud workloads that do not install the Office desktop clients.

Question 26Identify the core features and objects of Microsoft 365 services

What does a Microsoft 365 tenant represent for an organization?

  1. A dedicated instance of Microsoft cloud services Correct answer.
  2. A billing account that can only contain one user license
  3. A single shared mailbox used by every employee in the company
  4. A collection of on-premises servers that host Exchange databases

Explanation

A tenant is the organization's own instance of Microsoft cloud services, with its own directory, verified domains, and configuration settings. Every user, group, mailbox, and site the organization creates lives inside that boundary.

Question 27Identify the core features and objects of Microsoft 365 services

Which Microsoft 365 service hosts user mailboxes, calendars, and contacts?

  1. OneDrive
  2. SharePoint Online
  3. Microsoft Teams
  4. Exchange Online Correct answer.

Explanation

Exchange Online is the service that provides mailboxes, calendars, contacts, and mail flow for the organization. The other services store content, host sites, or provide collaboration but do not host the primary mailbox.

Question 28Identify the core features and objects of Microsoft 365 services

What is the primary purpose of OneDrive in Microsoft 365?

  1. To store team files that everyone in the tenant can access
  2. To host the organization's intranet home page
  3. To store and sync a single user's personal work files Correct answer.
  4. To hold mailbox content that is placed on legal hold

Explanation

OneDrive is the personal file storage service tied to an individual licensed user, and its sync client keeps those files available on the user's devices. Shared team content belongs in SharePoint or in a team's files area.

Question 29Identify the core features and objects of Microsoft 365 services

Which Microsoft 365 service provides chat, meetings, and channels for teamwork?

  1. Microsoft Forms
  2. Microsoft Purview
  3. Microsoft Teams Correct answer.
  4. Microsoft Planner

Explanation

Microsoft Teams is the collaboration hub that combines chat, meetings, calling, and channels, with files backed by SharePoint. Planner, Forms, and Purview address tasks, surveys, and compliance respectively.

Question 30Identify the core features and objects of Microsoft 365 services

Which object represents a person who can sign in to Microsoft 365 and be assigned a license?

  1. A resource mailbox
  2. A contact object stored in Outlook
  3. A distribution group
  4. A user account Correct answer.

Explanation

A user account is the identity object that authenticates, can hold a mailbox and OneDrive, and can receive a license. Contacts, groups, and resource mailboxes describe people or shared resources without providing a personal sign-in.

Question 31Identify the core features and objects of Microsoft 365 services

Which portal is the primary web-based tool for administering users, groups, and license assignments in a tenant?

  1. The Teams client settings dialog
  2. The Outlook on the web options page
  3. The SharePoint admin center for site and storage settings
  4. The Microsoft 365 admin center Correct answer.

Explanation

The Microsoft 365 admin center is the central portal for creating users and groups and for assigning licenses, domains, and roles. The workload-specific admin centers and end-user settings dialogs govern narrower areas.

Question 32Identify the core features and objects of Microsoft 365 services

Which Microsoft 365 service is used to create intranet and team sites that hold pages, lists, and libraries?

  1. Microsoft Viva Engage
  2. Microsoft Bookings
  3. SharePoint Online Correct answer.
  4. Exchange Online

Explanation

SharePoint Online hosts communication sites for intranets and team sites whose pages, lists, and libraries store content. Exchange, Viva Engage, and Bookings serve mail, social communities, and appointments.

Question 33Identify the core features and objects of Microsoft 365 services

Which app is used to organize work into tasks placed on boards and buckets that a team shares?

  1. Microsoft Outlook
  2. Microsoft To Do
  3. Microsoft Stream
  4. Microsoft Planner Correct answer.

Explanation

Planner arranges team tasks on shared boards divided into buckets and can be surfaced as a tab in Teams. To Do is a personal task list, while Outlook and Stream do not provide shared task boards.

Question 34Identify the core features and objects of Microsoft 365 services

A meeting organizer needs a conference room to accept or decline booking requests automatically. Which mailbox type should be created?

  1. A distribution group
  2. A user mailbox with delegate access
  3. A shared mailbox
  4. A room mailbox Correct answer.

Explanation

Room mailboxes are resource mailboxes that represent bookable locations and can automatically approve or decline meeting requests through their booking options. Shared and user mailboxes belong to people, and distribution groups only forward email.

Question 35Identify the core features and objects of Microsoft 365 services

Which statement about an org-wide team in Microsoft Teams is accurate?

  1. Members must be added one at a time by the team owner
  2. Every user in the tenant is added automatically as a member Correct answer.
  3. It can be created by any team member without admin rights
  4. It only supports private channels and no standard channels

Explanation

An org-wide team automatically includes all users in the tenant as members and supports up to 10,000 members. Only global or Teams administrators can create one, and it supports standard channels.

Question 36Identify the core features and objects of Microsoft 365 services

A company needs a group that both grants access to a SharePoint site and receives email sent to a single address. Which group type meets both requirements?

  1. A mail-enabled security group Correct answer.
  2. A non-mail-enabled security group
  3. A distribution list
  4. A dynamic device group

Explanation

A mail-enabled security group combines a security principal that can be granted permissions with an email address that receives messages. Plain security groups carry no address, and distribution lists are intended for mail distribution rather than permission assignment.

Question 37Identify the core features and objects of Microsoft 365 services

An external consultant needs access to a team's channels and files but should sign in with their own work account. Which object should be created?

  1. A guest user in Microsoft Entra ID Correct answer.
  2. A contact object in the global address list
  3. A shared mailbox for the consultant
  4. A new user account in the tenant's domain

Explanation

Guest users are business-to-business accounts invited into the tenant directory and limited to the resources shared with them, authenticating with their own credentials. Creating a normal licensed user account for an external person is generally inappropriate.

Question 38Identify the core features and objects of Microsoft 365 services

What does a retention policy in Microsoft Purview do?

  1. Keeps or deletes content for a set period Correct answer.
  2. Assigns licenses to members of a group automatically
  3. Blocks users from installing desktop apps on devices
  4. Encrypts email messages while they are being delivered

Explanation

A retention policy defines how long content is kept and whether it is deleted afterward, and it can apply to locations such as Exchange, SharePoint, and OneDrive. Encryption, app restrictions, and licensing are handled by other controls.

Question 39Identify the core features and objects of Microsoft 365 services

Which capability detects sensitive information such as credit card numbers and prevents users from sharing it outside the organization?

  1. An Exchange transport rule
  2. A SharePoint site collection quota
  3. A Teams messaging policy
  4. A data loss prevention policy Correct answer.

Explanation

Data loss prevention policies identify sensitive information types and then block, warn, or audit when that content is shared inappropriately across services. Messaging policies, transport rules, and quotas control chat features, mail flow, and storage rather than classifying sensitive content.

Question 40Identify the core features and objects of Microsoft 365 services

What is the purpose of eDiscovery in Microsoft Purview?

  1. To schedule automatic replies for mailboxes
  2. To search, preserve, and export content for legal cases Correct answer.
  3. To assign and manage telephone numbers for Teams users across the organization
  4. To publish a company-wide news page in SharePoint

Explanation

eDiscovery lets an organization identify, preserve, and export content that is relevant to investigations and legal matters, including placing sources on hold. It does not handle news publishing, auto-replies, or phone number management.

Question 41Identify the core features and objects of Microsoft 365 services

A trainer needs to collect anonymous feedback through a quiz-style survey. Which app fits?

  1. Microsoft Forms Correct answer.
  2. Microsoft Lists
  3. Microsoft Planner
  4. Microsoft Bookings

Explanation

Microsoft Forms creates surveys, quizzes, and polls and can be configured to collect responses without identifying respondents. Lists, Bookings, and Planner handle structured records, appointments, and tasks.

Question 42Identify the core features and objects of Microsoft 365 services

Users in one company need to chat and call colleagues in a different company who also use Microsoft Teams. Which setting enables this?

  1. External access Correct answer.
  2. Conditional access
  3. Sensitivity labels
  4. Guest access

Explanation

External access, also called federation, lets users in your tenant chat and call with users in other organizations who use Teams. Guest access instead invites an outside person into your directory with access to your own team resources.

Question 43Identify the core features and objects of Microsoft 365 services

An administrator must give one new employee a license without affecting any other user. What should the administrator do?

  1. Add the user to an email distribution list
  2. Turn on group-based licensing so every new user receives a license automatically as they join a department group
  3. Assign the license directly to the user's account Correct answer.
  4. Create a separate tenant for the employee

Explanation

A license can be assigned directly to an individual account, which changes only that user's product access. Group-based licensing applies to many users through membership, and distribution lists do not carry licenses at all.

Question 44Identify the core features and objects of Microsoft 365 services

A team needs to track structured records with columns such as status and due date inside SharePoint. Which component should be used?

  1. A document library
  2. A SharePoint list Correct answer.
  3. An Exchange public folder
  4. A OneDrive folder

Explanation

A SharePoint list stores structured items whose typed columns hold values such as status and due date, and it supports views and sorting. Libraries and OneDrive folders are built around files rather than structured rows.

Question 45Identify the core features and objects of Microsoft 365 services

A service business wants customers to book appointments online while staff availability is managed automatically. Which Microsoft 365 app provides this?

  1. Microsoft To Do
  2. Microsoft Viva Engage
  3. Microsoft Bookings Correct answer.
  4. Microsoft Stream

Explanation

Microsoft Bookings publishes a booking page, checks staff calendars, and manages appointments and confirmations. To Do, Stream, and Viva Engage handle personal tasks, video, and social communities.

Question 46Identify the core features and objects of Microsoft 365 services

Which statement describes a shared channel in Microsoft Teams?

  1. It is visible only to a subset of the team's owners and members
  2. It can include people from other organizations Correct answer.
  3. It keeps its files in the team owner's personal OneDrive
  4. It is created automatically for every new team in the tenant

Explanation

A shared channel allows people outside the team, including members of other organizations, to collaborate without being added to the whole team. Private channels are the type limited to a subset of the team's own members.

Question 47Identify the core features and objects of Microsoft 365 services

Why is a sensitivity label useful for a document that will be shared outside the organization?

  1. It travels with the file and the protection stays applied Correct answer.
  2. It renames the file so the recipient cannot find it
  3. It deletes the file automatically after thirty days
  4. It converts the document into a read-only PDF before it is shared externally

Explanation

A sensitivity label applies protection such as encryption that is stored with the file, so the restrictions continue to be enforced wherever the file goes. Labels do not change file format, schedule deletion, or disguise file names.

Question 48Identify the core features and objects of Microsoft 365 services

Which capability distinguishes Microsoft 365 E5 from Microsoft 365 E3?

  1. The installed desktop versions of Word, Excel, and PowerPoint
  2. Email hosting in Exchange Online
  3. Advanced compliance and voice capabilities Correct answer.
  4. Storage of files in OneDrive

Explanation

E5 builds on E3 by adding advanced compliance, analytics, and voice capabilities. Both suites include Exchange Online mailboxes, OneDrive storage, and the installed desktop Office apps.

Question 49Identify the core features and objects of Microsoft 365 services

An organization wants desktop Office apps to receive feature updates on a predictable monthly schedule. Which update channel should be used?

  1. Beta Channel
  2. Current Channel
  3. Monthly Enterprise Channel Correct answer.
  4. Semi-Annual Enterprise Channel

Explanation

The Monthly Enterprise Channel delivers feature updates once a month on a predictable schedule after validation. Current Channel ships features as soon as they are ready, and Semi-Annual Enterprise Channel ships them twice a year.

Question 50Identify the core features and objects of Microsoft 365 services

After an administrator deletes a user account from Microsoft 365, how long can the account be restored by default?

  1. 7 days
  2. 90 days
  3. 30 days Correct answer.
  4. 180 days

Explanation

Deleted user accounts remain in the directory recycle bin for 30 days by default, and an administrator can restore them during that window. Once the period passes, the account must be recreated and recovered content may be limited.