I'm having the following issue with clients since we've started upgrading to exchange 2016 and outlook 2016.
This is whats happening. everything is working fine and for some reason you close down outlook, when you start it again you will get the attached error.
"Cannot start microsoft outlook. Cannot open the outlook window. the set of folders cannot be opened. microsoft exchange is not available. either there are network problems or the exchange server is down for maintenance.
When you wait 20 to 25 min you can start it up fine again.
I came across a microsoft workaround that tells you to recycle the autodiscoverpool in your iis every few minutes. i'v set this up but besides creating a whole different list of errors and problems this does not seem to resolve the above issue.
I'v updated the clients and updated the exchange server 2016 to CU2.
Any idea's would be most welcome at this point.