Forum Discussion
Server Is Not Reachable over HTTPS
I finally got this issue resolved in case anyone else has this issue.
The initial reason was because the certificate was not trusted. Using Fiddler I was able to see it prompt me that the certificate was unsafe. Once I clicked Allow I was able to connect. For reference, our computer name is not the same as the web portal URL. We have multiple SANs.
After making the necessary changes to reflect one of the SANs, so the website was now trusted, I was getting a 'Unknown error occurred' when trying to connect via Power BI Desktop for Report Server. To fix this, I had to add BackConnectionHostNames to the registry and add our URLs.
You could try seeing if it is the issue with the Windows Credential cache that I outline here Power BI Report Server – fixing the “Server is not reachable” Error – Random Procrastination (gosbell.com)