We recently upgraded to Ex2013 (CU6) from Ex2007. The new environment includes Kemp hardware load balancers sitting in front of two physical servers that have both CAS and mailbox roles. There is a DAG, with databases split between the two servers.
We have several reports of users not getting emails. The users will get a flood of emails after manually opening the mail app (even though they are configured for push) or sometimes they have to hard reboot the phone. I have seen it first hand on my phone. I tried turning off wifi, toggling airplane mode. Nothing worked until I rebooted the phone. For the most part messages get delivered to phones, but there are too many reports of the issue to ignore. Appreciate any insight on how to troubleshoot this issue. Thanks, Robert
