Hi All,

I have a user, "Jane", on Win 7 SP1 (x86)/Outlook 2010. She has her own calendar and is also in control of another user's, "Bob's", calendar that she has added on her MAPI profile. When she creates a meeting on the Bob's calendar and invites some people, one invitee's email address changes from what she's entered on the To: field, to an old unused email address. This doesn't happen until she clicks Send. Then she receives an email undeliverable message. If she opens the meeting, the email address has been changed to the old/wrong address in the attendee list.

What's really weird is that this behaviour only happens when she invites people to a meeting that is on the other user's calendar. If she creates a test meeting on her own calendar and invites the particular invitee, it works fine.

Additionally, I went to the desk of the owner of the shared calendar, and created a test meeting in his calendar from his own Outlook on his own computer from his own AD account. The email address of that one person gets changed and then an undeliverable email message is received.

I'm thinking this isn't a problem with either user's Windows profile or Outlook MAPI profile. I had pondered if it was being caused by a configuration file in the calendar owner's, "Bob's", appdata folder, but if that were the case then I would expect the problem wouldn't happen for "Jane". Same if it were being caused by a user registry setting.

Any ideas?

Hi,

Please check the wrong email address for this user in outgoing message of Send Items folder and the received NDR in Inbox folder. We need to compare the email address to confirm the issue occurs before sending or during routing.

In Exchange side, please check whether there is any related rule to change the email addres for this user. In Outlook, also run Outlook \cleanrules to check whether the issue persists.

Please create a new Outlook profile for Bob and Jane, then send test message to others to have a try.

Regards,