Dears,
We have an existing Exchange server 2010 on a physical server. We installed and configured another two server 2010 SP3 + latest rollout on two virtual machines in DAG mode.
Emails are working fine except for emails that are being sent to a distribution group we are getting an error : 250 2.1.5 resolver.grp.expanded and anther error about storage transient failure.
When shutting down the two new servers everything is back to normal.
What could be the issue.
Best Regards,