Hello
I was running Exchange Server 2013 CU1 on a Windows Server 2012 server and decided to update it to CU3.
The first attempt led to a failure due to the fact that I had to first uninstall KB2874216: https://dirteam.com/blogs/davestork/archive/2013/09/25/failed-exchange-server-2013-cu2-install-due-to-security-update-2874216.aspx
This also left all the Exchange services disabled again so I had to re-enable them all in services.
After CU3 said it was successfully installed I restarted the server but then realised that external email seemed to stop coming in.
If I telneted to the server on port 25 it said
421 4.3.2 Service not available
If I restart the transport service then it works for a short while (about 15 minutes) and then goes back to saying service unavailable.
I have had to write a script and add a scheduled task to restart the transport service every 15 minutes to keep mailflow working.
I then decided to set up a new server with CU3 but after Exchange is installed on this second server it seems to have created 3 mailbox databases all of which are dismounted. If I try to create another database then I get this error:
An inconsistency in the Active Directory was detected: Database 'Mailbox Database RWS-MAIL1' is expected to be in a database availability group but the value for its MasterServerOrAvailabilityGroup property ('RWS-MAIL1') is not valid. This may be a defect in the product and this should be reported to Microsoft Product Support.I have waited 24 hours and tried again but still get the same error and the database I tried to create appears there as well but all are dismounted.
Please can someone suggest anything I can try to resolve this.
I have one server where the transport service doesn't work properly and another where I can't create any mailboxes.
Before CU3 everything was working normally on the first single server.
Thanks
Robin
Robin Wilson