Hi all,
I'm having problems isolating a problem on my Exchange server with mail flow. Specs are: Server 2008 R2, Exchange Server 2010 SP3, Xeon E5-2407 processor, 16GB memory, and multiple partitions (C:\ 80GB / 24.6 Free; D:\ 700GB / 386 Free (database storage); L:\ 100GB / 98.2 free (logs)). Server has ~100 clients. Domain is served by a pair of DCs running on Server 2012.
Seems the hub transport is dying of its own accord after a few minutes to a few hours after a restart. The server is several years old and been working well until now. No real changes to settings that should cause this, though this started after I installed a few updates a couple days ago. Even removing the likely culprits hasn't seemed to help though.
Only pertinent error is 1009: The Microsoft Exchange Mail Submission service is currently unable to contact any Hub Transport servers in the local Active Directory site. The servers may be too busy to accept new connections at this time.
I've run a health check / BPA, and permissions check, but nothing unexpected pops up (old drivers mostly). In searching for info on the error, I've seen issues on back pressure / disk space, but those don't seem to be a big concern with my setup. Any thoughts?