Remove Mailbox Permission (Full Access and Send As) Using PowerShell

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Microsoft 365

Before we proceed, depending on your environment, connect to Exchange Online remote PowerShell.

Remove Mailbox Permission (Full Access and Send As)

PS C:\WINDOWS\system32> Remove-MailboxPermission -Identity “[email protected]” -User “[email protected]” -AccessRights FullAccess
-InheritanceType All -Confirm:$false

Identity –  user or shared mailbox to be impacted
User – User that will get permission
AccessRights – permissions either FullAccess, SendAs …etc

 

List all User and Shared Mailboxes that a User has Permission

PS C:\WINDOWS\system32> Get-Mailbox -RecipientTypeDetails UserMailbox,SharedMailbox -ResultSize Unlimited | Get-MailboxPermission -User [email protected]

 

List all Mailboxes that a User has SendAs Permission

PS C:\WINDOWS\system32> Get-Mailbox | Get-RecipientPermission -Trustee [email protected]

 

Add Mailbox Permission

PS C:\WINDOWS\system32> Add-MailboxPermission –Identity “[email protected]” –User “[email protected]” –AccessRights FullAccess

Grant Mailbox Access Permission to Microsoft365 Mailbox

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