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MS-900 · Question #349

A company uses Microsoft 365 for email. The company plans to implement a solution for employees who leave the company. Currently, user Accounts of terminated employees are deleted immediately…

The correct answer is A. Apply a retention policy to the mailbox. D. Apply a Litigation Hold to the mailbox. To retain mailbox content for 90 days after employee termination, you need a mechanism that preserves the mailbox even after the user account is deleted. Both retention policies and Litigation Hold can convert a mailbox to an inactive mailbox state, preserving content for the…

Submitted by yuriko_h· Mar 5, 2026Describe security, compliance, privacy, and trust in Microsoft 365

Question

A company uses Microsoft 365 for email. The company plans to implement a solution for employees who leave the company. Currently, user Accounts of terminated employees are deleted immediately. Mailbox content for terminated employees must be retained for 90 days and then deleted. You need to identify solutions that meet the requirements. What are two possible ways to achieve this goal? Each correct answer presents a complete solution. NOTE: Each correct selection is worth one point.

Options

  • AApply a retention policy to the mailbox.
  • BRecover the inactive mailbox.
  • CRestore the inactive mailbox.
  • DApply a Litigation Hold to the mailbox.

How the community answered

(23 responses)
  • A
    74% (17)
  • B
    9% (2)
  • C
    17% (4)

Why each option

To retain mailbox content for 90 days after employee termination, you need a mechanism that preserves the mailbox even after the user account is deleted. Both retention policies and Litigation Hold can convert a mailbox to an inactive mailbox state, preserving content for the required duration.

AApply a retention policy to the mailbox.Correct

A Microsoft 365 retention policy applied to a mailbox before the user account is deleted will cause the mailbox to become an inactive mailbox rather than being permanently purged, preserving its content for the configured retention period (90 days in this case) after which it is automatically deleted - directly meeting the requirement.

BRecover the inactive mailbox.

Recovering an inactive mailbox restores it as a fully active mailbox by merging it with a new or existing account, which is a remediation action rather than a proactive retention solution and does not address the 90-day retention and deletion requirement.

CRestore the inactive mailbox.

Restoring an inactive mailbox merges its content into another existing active mailbox, which is a data-recovery operation and not a solution for automatically retaining and then deleting terminated employee mailbox content after 90 days.

DApply a Litigation Hold to the mailbox.Correct

Applying a Litigation Hold to a mailbox before the user account is deleted also converts it into an inactive mailbox, preserving all mailbox content indefinitely or for a specified hold duration; by setting the hold duration to 90 days, the content is retained and then removed, satisfying the retention requirement.

Concept tested: Inactive mailbox retention using holds and policies

Source: https://learn.microsoft.com/en-us/microsoft-365/compliance/inactive-mailboxes-in-office-365

Topics

#mailbox retention#Litigation Hold#retention policy#inactive mailbox

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