Shared Mailbox automapping issue.

Question

Hi Experts,
I have an issue in exchange.
I have created two shared mailbox, sharedX and sharedY and a user Admin1 .
Full Access rights has been granted to user Admin1 in shared mailbox sharedY.

And sharedY is given full access permissions in sharedX.

Now shared mailbox sharedY has automapped in user Admin1's mailbox. But sharedX has not automapped in user Admin1's mailbox.
And according to the rule sharedX mailbox should automap under the sharedY folder in the outlook of user Admin1's mailbox.
please suggest me something so that I can solve this issue.

Command used: Add-MailboxPermission -Identity sharedX@mydomain.com -User sharedY@mydomain.com -AccessRights FullAccess -InheritanceType All -Automapping $true

Thanks in Advance.

Answer 1

Hi,

To achieve your scenario, you have provide full access permission for Admin1 on SharedX mailbox as well. Automapping works based on the periodic autodiscover requests which happens for the users with logon. Shared mailboxes does not have a username and password.

A shared mailbox is a type of user mailbox that doesn't have its own username and password. As a result, users can't log into them directly. To access a shared mailbox, users must first be granted Send As or Full Access permissions to the mailbox. Once that's done, users sign into their own mailboxes and then access the shared mailbox by adding it to their Outlook profile.

Please try the below command,

Add-MailboxPermission -Identity sharedX@mydomain.com -User Admin1@mydomain.com -AccessRights FullAccess -InheritanceType All -Automapping $true

Answer 2

There's no command could make sharedX existing in Admin1's mailbox. It's by-design phenomenon of mailbox permission.
"And according to the rule sharedX mailbox should automap under the sharedY folder in the outlook of user Admin1's mailbox."
-Actually, Full access means Allows the delegate to open the mailbox, and view, add and remove the contents of the mailbox. It doesn't mean Admin1 can open/view those mailboxes that delegated by SharedY. If SharedX exsits in Admin1's mailbox as you expected, you are full accessing a mailbox without permission, Microsoft doesn't want to see it happening.
According to my test, no matter the shared mailbox is mapped due to automapping or manually adding it in "Account setting", you can't view the mailboxes delegated by SMB2:

By the way, I've also tested replacing SharedY with a user mailbox, same phenomenon as above.

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