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Does anyone know if its possible to assign a group to a shared mailbox with Office 365? This seems to be possible with on-prem Exchange, based on the threads I've read, but I'm having issues with Exchange Online.

The GUI definitely doesn't allow it, but the following PowerShell command executes without an error:

Add-MailboxPermission -Identity "shared-mailbox@mydomain.com" -User "security-group-name" -AccessRights FullAccess -InheritanceType All -AutoMapping $true

After I execute that command I can even go to the Exchange Online Admin Portal and under:

Recipients -> Shared

If I Edit the shared mailbox and go to "mailbox-delegation", I see the group name listed under "Full Access".

However, if I open Outlook and mount the shared mailbox, it won't let me list the contents.

I'm wondering if this is a timing / sync issue; or if this is truly not supported. Its been about an hour at this point and it still doesn't work in Outlook.

Doug
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1 Answers1

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From my own experience and testing:

You can assign a group to a mailbox, but a few functions don't work, such as auto mapping of the mailbox.

This means that the user can access the mailbox, but they have to add it themselves.

Depending on how they add the mailbox, they can or cannot send mail from that mailbox.

If you, however, don't use groups, but assign users to the mailboxes, then it will work as intended.

LPChip
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