Compliance Problems

How to Exclude a Shared Mailbox from Sensitivity Label Requirements in Microsoft Purview

Natalie Taylor Oct 13, 2026 869 views

Question details

The user needs to prevent Microsoft Purview sensitivity labels from being required for messages handled through a shared quarantine mailbox, without disabling protection for individual staff accounts.

How to Exclude a Shared Mailbox from Sensitivity Label Requirements in Microsoft Purview

Product: Microsoft Purview
Device & OS: not provided
Scenario: An administrator is trying to manage sensitivity label policies so that staff members are not prompted or forced to apply labels when interacting with emails inside a shared quarantine mailbox.
Observed behavior: Because sensitivity-label policies apply to the users rather than mailboxes, staff members are incorrectly being required to apply sensitivity labels when managing messages in the shared mailbox.

Before you start

Ensure you are logged in to the Microsoft Purview compliance portal with an account that has the Compliance Administrator or equivalent role.

Solution 1Recommended

Configure the Label Policy to Exclude Specific Recipients

Modify your existing sensitivity label policy in Microsoft Purview to explicitly exclude the shared mailbox address, bypassing the labeling requirement for that specific mailbox.

Sensitivity-label policies apply to the staff members using the mailbox, not the mailbox itself. By adding an exclusion to the policy, you can ensure that messages sent to or managed within that shared mailbox bypass the label requirement, while still retaining full compliance protection on the staff's personal accounts.

Access Microsoft Purview

Navigate to Label Policies

In the left-hand navigation pane, go to Information Protection and click on the 'Label policies' tab.

Edit the Target Policy

Select the sensitivity label policy that is currently enforcing the requirement on your staff and click 'Edit policy'.

Add the Exclusion

Proceed through the policy settings until you find the 'Exclude specific recipients or domains' option. Add the email address or domain of the shared quarantine mailbox to this list.

Save and Publish

Review your changes and click 'Save' or 'Submit' to update the policy. Note that it may take some time for the policy changes to propagate across your tenant.

Configure the Label Policy to Exclude Specific Recipients

Tenant Configuration Dependency: The 'Exclude specific recipients or domains' option may depend on your specific Microsoft 365 tenant configuration and licensing. If you do not see this option, verify your tenant's feature rollout status.

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Frequently Asked Questions

Why do sensitivity labels apply to a shared mailbox in the first place?

Sensitivity labels apply to the individual user accounts accessing the shared mailbox rather than the mailbox object itself. Since the policy targets the user, any action taken by that user within the shared mailbox triggers their personal label policy requirements.

What if the 'Exclude specific recipients' option is missing from my policy settings?

If this option is not visible in your Microsoft Purview portal, your tenant might not have this feature enabled, or your administrative role might lack sufficient permissions. Verify your Microsoft 365 licensing or consult with your global administrator.

Will excluding the shared mailbox remove existing labels from older emails?

No. Excluding a shared mailbox or domain from a sensitivity label policy only affects future actions and prevents the policy from enforcing labels on new items. Emails that have already been labeled will retain their current sensitivity labels unless manually removed.

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