I have a problem with undeliverable meeting requests on Exchange server 2007.
Assistent is a user that manages meetings. Assistent sends meeting requests using MS outlook 2007 sp3 client. She has a valid user and exchange account and a valid email address. All email in and out is working ok. 100 exchange users have no other issues. Server never had any problems.
When assistent creates meeting request to user 'joe' user joe gets the meeting request on his active sync enabled device and fat outlook client.
When joe click on 'accept' after 20 seconds he gets and 'undeliverable' message back from the system. Another user 'betty' has the same exact problem. She also can not answer to meeting request.
This is the error:
#550 5.1.1 RESOLVER.ADR.ExRecipNotFound; not found ##
The error was probably coused (and started) when the user account was deleted in active directory. The user with the same username was created and the exchange mailbox (from deleted user) was attached to new user. Both old user account and new user account have the same username and the same email address.
I need help identifying the problem and getting additional tehnical information where and how this problem can be troubleshooted.