In my outlook(2007), i am using my mail box to send the mail and receiving the mail every thing working fine, now what happened , i am adding one of my users mail box to my outlook profile,and trying to send the mail from that mail box,when ever i am trying to send its give me the message called message undelivered and permission error. as i am full permission on that users mail box. but still getting that issue.
My lab info
Exchange server 2010 sp3
outlook 2007