Hi,
I've just transitioned to exchange 2010 from exchange 2003.
the exchange 2003 is still operational until i see that everything's working ok. I've moved all the mailboxes to the new exchange 2010 database but ONE user is complaining he's getting a sporadic NDR.
according to what i've digged up is that most probable that the problem is in his laptop. When he's in the company he doesn't have problems sending mail to internal user. only when he is outside the compant eg, home public wifi then he receives a lot of these NDR's.
he's using outlook 2010 configured with HTTPS over RPC. connected his old archive PST.
what i've done already:
cleared his cache of addresses. - didn't help
created a new outlook profile (don't remember if i created a new OST or might have connected to the old OST) - didn't help
worked without cached exchange mode - didn't help
when at home he connected to the internal network via VPN and that seemed to reduce the NDR's but still getting them.
OWA works ok.
what am i missing? it's driving him and me nuts.
Thanks in advance.