I have an Exchange 2016 server which is updated to the latest CU and security updates. out of office from the outlook client has quit working and I have been unable to get it working. It works fine from OWA. There are some WAS 5011 warnings in the event log. A process serving application pool 'MSExchangePowerShellFrontEndAppPool' suffered a fatal communication error with the Windows Process Activation Service. any ideas would be greatly appreciated.
