Unable to connect to SSRS via SSMS or via URL/Browser. Reporting Services gives this error SSRS error HTTP Error 503. The service is unavailable.
Error in SSMS
Unable to connect to the server at SERVERNAME. The specified URL might not be valid or there might be a problem with the report server version or configuration
Error in SSRS logs
e ERROR: Failed to register url=https://
How to resolve this error
After hours of research and trying different things this was eventually solved by
1./ Removing all the urls for webservice and report manager url in Reporting Services Configuration Manager.
2./ Manually editing the rsreportserver.config file and removing any entries between the [url] tags (there were some
not being cleaned up properly )
3./ Restarting the SSRS service, and readding the URL’s with a fresh port number ( I had already tried changing
port numbers earlier with no success)
This solved the issue.
Please note IIS also existed on this server.
Let me know if this helps you!