We can remove full access permission from an Exchange Online mailbox using the powershell cmdlet Remove-MailboxPermission.
Note: Before proceed, Connect Exchange Online Remote PowerShell.
Run the following command to remove the user Morgan‘s full access permission from Kevin’s mailbox.
Remove-MailboxPermission -Identity "[email protected]" -User "[email protected]" -AccessRights FullAccess
Identity – The name of the user on which the full access permission to be removed.
User – The mailbox that has the full access permission.
List mailbox permissions
Use the below command to list permissions of a mailbox.
Get-MailboxPermission -Identity '[email protected]' | Select User, AccessRights, Deny
Use the below command to list permissions of all the mailboxes.
Get-Mailbox -ResultSize Unlimited | Get-MailboxPermission | Select Identity, User, AccessRights, Deny
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