shared mailbox Office 365 – cannot expand folder both in OWA and Outlook

There is a bud in the GUI of Office 365 when delegating full permission to a user for shared mailbox.

Even if you give the correct permission you cannot expand the mailbox.

The fix is to remove and readd the permission with these powershell comamnds:

To Add

Add-MailboxPermission -Identity JDoe -User ‘testuser22’ -AccessRights FullAccess -InheritanceType All -AutoMapping $false

To Remove

Remove-MailboxPermission -Identity JDoe -User ‘testuser22’ -AccessRights FullAccess -InheritanceType All

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