Shared mailbox send as not working

Users were added as shared mailbox members using Office 3Admin centre. We have domains in the same tenancy and have on many occasions set a shared mailbox to be accessed by a mailbox in the other domain. We use office 3and we sync our local AD groups with Azure AD in the cloud. For some reason on different mailboxes, permissions are not working when a user tries to send. User cannot send on behalf of a shared mailbox.

When I send new messages from the shared mailbox , the default address is my own address, not the shared mailbox address and I need to select the shared mailbox as From address. Other accounts default to using their own address. You do not have the permission to send the message on behalf of the specified users.

Instea you sign in to your own mailbox , and then you open the shared mailbox. When you send or reply to a new message from. Shared mailbox not working Hi, We are experiencing trouble accessing the shared mail box. We do see that we are getting mail but we.

So if I move the shared mailbox to O36 that user SHOULD be able to ‘ send as’ the shared mailbox ? The shared mailbox properties still show this user in the full access and send as list. The shared accounts address is available in the GAL so that is not an issue. Any ideas would be appreciated. I could probably recreate this mailbox , but would rather fix the issue or at least know what happened in case it does it again. If you want to apply a rule to a shared mailbox , you must add the shared mailbox account into Outlook and then sign in with your own credentials.

Or the rule will be not work. Turns out normal user mailboxes were not working either. This was all working great until this week. So we make a new mailbox in O36 a mailgroup in this case.

You are not allowed to send as this user. I have been added as a delegate with editor permissions in shared mailbox. It should be visible as if the mail is sent from shared mailbox. Specifically, we want to be able to have any messages that are Sent As the shared mailbox to.

Hide the mailbox from the address list again. Is there a fix for this issue? Thanks for Sent Items fix. The information that was provided in the former section is relevant to any type of Exchange mailbox. You configure a Microsoft Outlook profile for the shared mailbox and enter your own credentials to access it.

We have only ever controlled shared mailbox access via security group. Add users to security group. Grant security group full and send -as permissions to the shared mailbox. Create the security group.

You can also use the shared mailbox as a shared team calendar. A shared mailbox is not designed for direct log on though. The user account for the shared mailbox itself should stay in. This work-around is not supported by Microsoft at all at this point.

They are working on a more manageable solution, but there is no ETA for that right now. Send -on-Behalf-of permissions.