Situation: client migrates from hosted Exchange to in house Exchange. All mailboxes are backed up to PST via Outlook, Outlook is reconfigured with in-house account, and PST is dumped into Outlook and up to server. (BTW does anyone have a better method? I've never used exmerge but I know of it...)
Now, emails from prior to the migration have internal recipients on them, obviously. When they are replied to or forwarded, a slew of NDR's come in:
5.1.2 - The message could not be delivered because the recipient's destination email system is unknown or invalid.
Upon investigation, I find that when I double click the recipent on these old emails (which looks nice and tidy like it came off the GAL <u>"First Last"</u>) the display name reads:
/O=ORG1/OU=FIRST ADMINISTRATIVE GROUP/CN=RECIPIENTS/CN=username
and email tab is blank. Clearly a holdover from the old system.
Where does one start?