I'm having an issue with running a new-MailxboxExportRequest command against 2 mailboxes. I'm receiving an error that I Couldn't connect to the source mailbox. --> MapiExceptionUnknownUser: Unable to make connection to the server. I have full mailxbox access and have no problems with any other mailbox in the organization.
The only change was this use to be a linked mailbox that we converted to a user mailbox. As part of this process we removed all smtp address and supplied a fake address to prevent mail flow. I can run get-mailbox and get-mailboxstatisics against the mailbox all day long just can't connect via Outlook or run export processes.
I'm at a lost here as to what the issue is.