I have a tricky one issue.
My customer deleted a user + mailbox called Martine Gosselin. (Exchange 2010)
This user had a delivery option/forward mail to another user configured. This setting wasn't removed prior to the user deletion.
So far quite simple, BUT whenever the president of this company send a meeting request to any internal employee. When they actually accept the request they automatically receive the error message attached to this post. The president receive the confirmation tough.
So I'm biting my tongue trying to find which parameters is messed up XD.
I tested with other account and there is no problem at all. Only him sending a meeting request create the issue. When we actually send/reply an email to him everything is fine.
So... Help please :) I could recreate the user/mailbox and that would fix it.tough this is not an option.
I looked at the calendar permission and there is no "SID" or dead user no where.