How to create and edit shared mailboxes in Exchange Online

How to create a shared mailbox using the Exchange Admin Center (EAC)

1. Open the EAC and go to Recipients > Mailboxes .
2. Click on Add a shared mailbox and fill in the required details, such as Display Name , Email Address, and Alias .
3. Click Create to save your changes. Now, you have created a shared mailbox.
4. In the Next Steps section, click the Add users to this mailbox .
5. Click the Add users button and select the users you want to grant permissions to the shared mailbox. You can either grant Full Access or Send As Permission to the users.
6. Click Save.

Use the following cmdlet to create a shared mailbox using the Exchange Online PowerShell:

New-Mailbox -Shared -Name "Sales Department" -DisplayName "Sales Department" -Alias Sales | Set-Mailbox -GrantSendOnBehalfTo MarketingSG | Add-MailboxPermission -User MarketingSG -AccessRights FullAccess -InheritanceType All

How to edit a shared mailbox delegation using the EAC

1. In EAC, go to Recipients > Mailboxes .
2. Select the shared mailbox you want to edit and click Manage mailbox delegation .
3. Select Edit next to the permission type to grant or remove Full Access and Send As permissions.
4. In the Manage mailbox delegation page, you can remove existing permissions by clicking on the listed users or grant new permissions by clicking Add permissions and selecting the users you want to authorize.
5. Click Save .
6. Click Close to close the Mailbox permissions added/removed page.

How to edit a shared mailbox delegation in M365 Manager Plus:

1. Log in to M365 Manager Plus.
2. Go to Management > Exchange Online > Shared Mailbox Management .
3. Under the Shared Mailbox Tasks, select Shared Mailbox delegation . You can choose to modify the send as, send on behalf and/or full access permissions.
4. Select the permissions, users, and groups that you want to modify, as well as the respective Microsoft 365 tenant and virtual tenant.
5. You can either enter the names of the mailboxes you want to edit manually or upload a CSV file with the required details for bulk modification.
6. Click Find. You will see the list of mailboxes. Click Apply to apply the changes.