Forum Discussion
Outlook cannot connect to exchange but OWA can
Hi, Ive built a new exchange 2019 environment on windows 2019 server (twice) and each time i get the following error when trying to connect my outlook on the win10 client to exchange "Cannot...
I figured out what is happening.
After verifying the Exchange connection and setting up the profile successfully, the Outlook client pings the default gateway before connecting to the Information Store. If the ping is not successful, Outlook stops and reports that it either can't open the information store or that it can't open your profile's set of folders. This happens even though when you set up the profile, it successfully connected to Exchange.
So in my test environment, where the client machine was getting a default gateway through DHCP, but where that default gateway didn't actually exist, I had to set a static IP address on the client machine, and used the AD server in my restore environment as the gateway. Even though it won't really route any traffic, it was enough for Outlook to get an ICMP response from the server to fake it into thinking the gateway was up, and I was able to load Outlook with no issues after that.
