Share via

Exchange online: full access and Send as Permissions Cross premise

  • Article

Many of you would have come across situations where a user mailbox when moved to o365, might not be able to send as a shared mailbox or other mailbox which is still on premise.

You would check that both the objects are already in the scope of the AAD sync. I researched various articles and also tested to find out that somehow the send as permissions attribute is not updated to cloud object so we have to do the below to make this work without issues.

use the powershell command to re give the permission

add-recipientpermission -identity sharedmailbox -trustee clouduser -accessrights send-as (or sendas)

for fullaccess

AD attributes MsExchDelegatelLstlBL (the DN to whom this object as full access, also called back link) and MsExchDelegateListLink (the DN of the users who have access) are important.

Make sure both attributeas are updated for user account and the shared mailbox object account.