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Microsoft AB-900 Premium Bundle

AB-900 Premium File: 99 Questions & Answers

Last Update: Oct 06, 2026

AB-900 PDF Study Guide: 314 Pages

$74.99

AB-900 Bundle gives you unlimited access to "AB-900" files. However, this does not replace the need for a .vce exam simulator. To download your .vce exam simulator click here

Microsoft AB-900 Practice Test 1

Question 1

An administrator needs every member of the New-Hires group to receive the same eligible Microsoft 365 license whenever they join the group. Which Microsoft 365 capability is MOST appropriate?

  1. Review subscription seat totals and assignment counts in Microsoft 365 billing.
  2. Assign the product license to the Microsoft Entra group.
  3. Assign the eligible product license directly to the executive account.
  4. Adjust the assigned license service plans for that group.

Explanation

Correct Answer

B:

Group-based licensing evaluates members and automates eligible license assignment. This directly addresses automatic entitlements for changing group membership.

Incorrect Answers

A:

Available and assigned seat counts expose whether more capacity is needed. Its purpose is accurate remaining license capacity; the specified need is automatic entitlements for changing group membership.

C:

A direct assignment targets one named identity rather than an entire cohort. Its purpose is a single named user subscription; the specified need is automatic entitlements for changing group membership.

D:

Service-plan settings govern which subservices within an eligible product are enabled. It would support feature-level entitlements within the license, not the stated automatic entitlements for changing group membership.

Question 2

A new organization must verify ownership of its custom DNS domain before using it for employee sign-ins. Which approach solves the stated need?

  1. Inspect the service health dashboard in the Microsoft 365 admin center.
  2. Review the Microsoft 365 Message center notices.
  3. Add and verify the domain through the Microsoft 365 admin center with the requested DNS record.
  4. Review and update organization settings in the Microsoft 365 admin center.

Explanation

Correct Answer

C:

Domain verification establishes control of the organization namespace. This directly addresses verified custom tenant domain.

Incorrect Answers

A:

Service health tracks provider incidents and advisories by workload. This helps with official current service incident visibility instead of the required verified custom tenant domain.

B:

Message center announcements communicate feature rollout and required admin actions. The action is relevant to planned service change notices rather than verified custom tenant domain.

D:

Organization settings govern tenant-level service preferences and contact data. The action is relevant to central organization profile administration rather than verified custom tenant domain.

Question 3

A finance employee needs a private inbox and calendar under their own identity. Which Microsoft 365 capability is MOST appropriate?

  1. Configure a shared mailbox and delegate access to the agents.
  2. Create a distribution group for the recipients.
  3. Create a Microsoft 365 group for the project.
  4. Use a licensed user mailbox for the employee.

Explanation

Correct Answer

D:

A user mailbox is associated with the person's account and personal work mail. This directly addresses personal employee messaging.

Incorrect Answers

A:

Shared mailbox delegation supports a team-operated inbox under one address. It is used for jointly handled helpdesk messages; this scenario calls for personal employee messaging.

B:

Distribution groups expand mail addressed to a group into member delivery. That addresses mail-only announcement distribution, whereas the current case requires personal employee messaging.

C:

Microsoft 365 groups provide linked collaborative services, including a group mailbox and site. It is used for integrated membership-backed collaboration; this scenario calls for personal employee messaging.

Question 4

Security wants incoming mail with a specific organization-required header routed for inspection. Which approach solves the stated need?

  1. Configure a scoped mail flow rule in the Exchange admin center.
  2. Run message trace in the Exchange admin center.
  3. Configure the domain as an accepted domain in Exchange Online.
  4. Configure an appropriate mail-receive restriction on the mailbox.

Explanation

Correct Answer

A:

Transport rules evaluate message attributes and apply routing or protection actions. This directly addresses custom message processing conditions.

Incorrect Answers

B:

Message trace records transport events and delivery status for mail. Its purpose is individual mail delivery troubleshooting; the specified need is custom message processing conditions.

C:

Accepted domains identify namespaces the organization handles for mail. It would support accepted inbound email namespace, not the stated custom message processing conditions.

D:

Recipient restrictions prevent delivery according to the specified recipient configuration. Its purpose is limited receipt for the affected mailbox; the specified need is custom message processing conditions.

Question 5

A department needs a distinct collaborative workspace with access managed separately from other departments. Which Microsoft 365 capability is MOST appropriate?

  1. Create a SharePoint list with the required columns.
  2. Create an appropriate SharePoint site for that department.
  3. Create a document library within its SharePoint site.
  4. Add folders within the existing document library.

Explanation

Correct Answer

B:

Sites form independent workspace boundaries with their own membership and content. This directly addresses a department-wide collaborative container.

Incorrect Answers

A:

Lists manage structured rows and business records. The action is relevant to structured nonfile tracking records rather than a department-wide collaborative container.

C:

Libraries provide file storage, versioning and metadata in the site. The action is relevant to managed documents with versions rather than a department-wide collaborative container.

D:

Folders group library items without creating a separate site or library. This helps with hierarchical filing within a library instead of the required a department-wide collaborative container.

Question 6

A site manager must edit the site structure, manage permissions, and administer membership. Which approach solves the stated need?

  1. Assign the SharePoint site Visitors read role.
  2. Review and set unique permissions on that item where justified.
  3. Assign the appropriate SharePoint site Owners role.
  4. Add contributors as SharePoint site Members with edit access.

Explanation

Correct Answer

C:

Owners are responsible for site administration and permissions. This directly addresses administering the SharePoint site.

Incorrect Answers

A:

Visitors are granted view access rather than content modification. That addresses read-only site access, whereas the current case requires administering the SharePoint site.

B:

Item-level permission exceptions can restrict access compared with inherited container rules. It is used for a justified one-file permission exception; this scenario calls for administering the SharePoint site.

D:

Members can work on site content without the owner-level management responsibility. It is used for routine content contribution; this scenario calls for administering the SharePoint site.

Question 7

A department wants one governed membership boundary for channel-based workplace discussions. Which Microsoft 365 capability is MOST appropriate?

  1. Use a standard channel within the existing team.
  2. Create a private channel with separately managed members.
  3. Use a supported shared channel with the required sharing configuration.
  4. Create a Microsoft Teams team for the department.

Explanation

Correct Answer

D:

A team provides membership and a collection of collaborative channels. This directly addresses a shared team workspace.

Incorrect Answers

A:

Standard channels inherit the parent team membership. Its purpose is discussion visible to all team members; the specified need is a shared team workspace.

B:

Private channels restrict discussion and files to approved channel members. It would support restricted subset discussion within a team, not the stated a shared team workspace.

C:

Shared channels support collaboration across participating teams or supported external parties. Its purpose is cross-team channel collaboration; the specified need is a shared team workspace.

Question 8

A company prohibits message deletion for a particular Teams user population. Which approach solves the stated need?

  1. Assign an appropriate Teams messaging policy to that population.
  2. Configure the applicable Teams meeting policy and meeting options.
  3. Configure Teams app permission and app management policies.
  4. Assign a supported Teams calling policy to its eligible users.

Explanation

Correct Answer

A:

Messaging policies control supported chat and message behaviors. This directly addresses restricted message deletion behavior.

Incorrect Answers

B:

Meeting settings govern lobby and participant controls. The action is relevant to a governed meeting joining experience rather than restricted message deletion behavior.

C:

App governance determines allowed or blocked Teams applications. This helps with approved Teams application catalog instead of the required restricted message deletion behavior.

D:

Calling policies control applicable call features for assigned users. The action is relevant to different user calling controls rather than restricted message deletion behavior.

Question 9

An application needs an access-control set with no collaborative mailbox or group site. Which Microsoft 365 capability is MOST appropriate?

  1. Use a mail-enabled security group where supported.
  2. Create a Microsoft Entra security group for the access assignment.
  3. Use a Microsoft 365 group with connected collaboration resources.
  4. Use an Exchange distribution group.

Explanation

Correct Answer

B:

Security groups are general principals for role and resource access. This directly addresses authorization-only membership.

Incorrect Answers

A:

Mail-enabled security groups combine distribution and security principal functions. It is used for combined mail and access group; this scenario calls for authorization-only membership.

C:

Microsoft 365 groups provision linked productivity workloads for members. It is used for team productivity membership; this scenario calls for authorization-only membership.

D:

Distribution lists are designed for message fan-out. That addresses announcement-only email list, whereas the current case requires authorization-only membership.

Question 10

A new permanent staff member needs an organization-managed identity to sign in to Microsoft 365. Which approach solves the stated need?

  1. Use an application service principal in the tenant.
  2. Create an appropriate Microsoft Entra group for the finance members.
  3. Create an internal member user account in Microsoft Entra ID.
  4. Invite the contractor as a Microsoft Entra B2B guest.

Explanation

Correct Answer

C:

Member accounts represent identities maintained by the organization. This directly addresses internal employee identity.

Incorrect Answers

A:

Service principals represent applications as security identities within a directory. It would support workload authorization identity, not the stated internal employee identity.

B:

Groups collect identities for targeting permissions and assignments. Its purpose is reusable cohort membership; the specified need is internal employee identity.

D:

Guest collaboration enables external identities with tenant-managed resource permissions. Its purpose is outside collaborator with scoped access; the specified need is internal employee identity.


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