Sending the Messages with the SendAs and Delegate Rights

If User A has the SendAs right to the User B's mailbox and when sending a message he / she enters User B's address into the From field, the message will be considered as coming from User B, therefore rules covering User B will be executed. However, if User A is defined as a Delegate of User B (On behalf of permissions) and when sending a message he / she enters the address of User B into the From field, the message will be considered as coming from User A, and rules covering User A will be executed.

Info

Please note, that Sent Items Update feature works only with messages sent using Delegate (On behalf of) permissions. 

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