To react quickly to special requests, you can assign mail-enabled distribution groups directly to mailboxes.
To assign mail-enabled distribution groups to a mailbox
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In the Manager, select the Azure Active Directory > Mailboxes category.
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Select a mailbox in the result list.
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Select the Assign mail-enabled distribution list task.
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In the Add assignments pane, assign mail-enabled distribution groups.
TIP: In the Remove assignments pane, you can remove assigned mail-enabled distribution groups.
To remove an assignment
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Select the mail-enabled distribution group and double-click
.
 
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 - Save the changes.