This is an Exchange 2013 CU2 install. It's once year old and pretty static.
Over the last few weeks, more and more users are reporting that their outlook is showing a popup that outlook is trying to retrieve information from the exchange server. This lasts about 30-45 seconds.
It's a VM and my host and VM both have substantial resources. There is more than sufficient HD space and RAM and my NIC throughput is low. It's a gigabit NIC and it seldom breaks over 10MBps. The log is clean, as in nothing even close to reporting a problem, but still, I have actually been onsite and seen the popup and experienced it myself.
Again, this is random, intermittent, sporadic and only lasts about 30-45 seconds.
I'm thinking I'll do CU6 tonight, but I'm looking for other ideas as well.
Any thoughts on what could be causing the problem?
BTW- I can resolve fine and my DNS is good.