We have a client who has recently upgraded to exchange 2007 sp1
they were working fine for a few weeks after the upgrade and then for no apparent reason the Hub Transport stopped delivering email. The users are able to open their mailboxes as the store is mounted, but they are not able to send email.
the significant event id's are 1009
we are also getting 430 4.2.0 STOREDRV; mailbox logon failure
the only microsoft reference for this is
which we have tried even though the Network Service account is still being used, so we just reset it.
we have also tried everything on the following urls'
(ACL on Cisco router)
(Wants MS PMTU black hole detection as per http://support.microsoft.com/kb/900926
(considered removing Pipeline tracing on Exchange)
(Exchange 2007 Anti-Spam causing connection timeouts?)
(Look at increasing Exchange SMTP timeout from 10 minute even for active!?)
we have now done a complete DR of the server to try and resolve the issue, which has not helped at all which led us to believe that it was an AD issue so we ran the SP1 -X to extract all the SP1 source files then rant setup /preparead to correct any AD schema and permissions issues.
We are completely out of ideas now
NOW I AM DESPERATE
any help will be appreciated if i could give 1000 point i would.
So far MS support services is also stumped.