License & Subscription Issues

How to Assign a Microsoft 365 License and Power Automate to a Shared Mailbox

Khadija Khan Oct 22, 2026 869 views

Question details

The user is asking whether it is possible to assign a Microsoft 365 license to a shared mailbox and use it with Power Automate while keeping its shared access permissions intact.

How to Assign a Microsoft 365 License and Power Automate to a Shared Mailbox

Product: Microsoft 365
Device & OS: not provided
Scenario: Setting up automated workflows for a shared inbox using Power Automate, which requires licensing without breaking standard shared mailbox routing.
Observed behavior: The goal is to successfully allocate a Microsoft 365 and Power Automate license to a shared mailbox account to run automated flows while retaining standard multi-user access permissions.

Before you start

Ensure you have Microsoft 365 Global Administrator or Exchange Administrator privileges, as you will need access to both the Exchange admin center and Microsoft 365 admin center.

Solution 1Recommended

Assign a License and Enable Power Automate for the Shared Mailbox

Step-by-step instructions on creating a shared mailbox, assigning the necessary Microsoft 365 and Power Automate licenses, and granting permissions.

By default, a shared mailbox in Exchange Online does not require a license if it remains under 50GB. However, if you want the shared mailbox to independently run Power Automate flows, it must be treated like a standard user account in terms of licensing. You can assign it a Microsoft 365 license and a Power Automate license without losing its shared permissions.

Create the Shared Mailbox

Navigate to the Exchange admin center. Go to Recipients > Mailboxes, select 'Add a shared mailbox', and enter the required details (Name and Email address).

Assign Microsoft 365 and Power Automate Licenses

Open the Microsoft 365 admin center and go to Users > Active users. Locate the shared mailbox you just created, click on it, and go to the 'Licenses and apps' tab. Check the box to assign a Microsoft 365 license and ensure the Power Automate capability is enabled.

Set a Password for Direct Sign-in

While still in the Active users menu, select the shared mailbox and click 'Reset password'. Because shared mailboxes do not have passwords by default, you must set one so you can directly log into Power Automate with this account.

Configure Mailbox Permissions

Return to the Exchange admin center (Recipients > Mailboxes), click on the shared mailbox, and select 'Delegation'. Ensure the appropriate team members are granted 'Read and manage' as well as 'Send as' permissions.

Log into Power Automate

Go to the Power Automate website and sign in using the shared mailbox's email address and the newly created password to start building your automated workflows.

Assign a License and Enable Power Automate for the Shared Mailbox

Alternative Trigger Method: If you do not wish to pay for an extra license, a fully licensed user with 'Read and manage' permissions can create a flow using the 'When a new email arrives in a shared mailbox' trigger from their own Power Automate account.

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Frequently Asked Questions

Does a shared mailbox normally require a Microsoft 365 license?

No. By default, a shared mailbox with up to 50 GB of storage does not require a Microsoft 365 license. A license is only required if you want to exceed the 50 GB storage limit, enable an archive mailbox, or utilize standalone services like Power Automate.

How do I log into Power Automate with a shared mailbox?

Since shared mailboxes do not have a password initially, an administrator must assign a password in the Microsoft 365 Admin Center under Active Users. Once a password is set and the account is licensed, you can sign into Power Automate using the shared mailbox's email and password.

Can I trigger a Power Automate flow using a shared mailbox without licensing it?

Yes. If a standard user has their own Microsoft 365/Power Automate license and full access permissions to the shared mailbox, they can create flows triggered by events in the shared mailbox (such as 'When a new email arrives in a shared mailbox') without needing to license the shared mailbox itself.

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