Sharepoint Troubleshooting: The Remote server returned an error (503) server unavailable
Introduction
The Remote server returned an error (503) server unavailable (or) the HTTP service located at http://localhost:32843/SecurityTokenServiceApplication/securitytoken.svc is too busy.
Issue
When we try to browse the SharePoint site, we get the error “The Remote server returned an error (503) server unavailable” or the HTTP service located at http://localhost:32843/SecurityTokenServiceApplication/securitytoken.svc is too busy.
Solution
The issue occurs due to the Security Token service application pool. Follow the steps below to resolve the issue:
- Ensure that the password provided to the user name for Token application pool is correct.
- Ensure that the “security Token service application” is started.
See more: http://expertsharepoint.blogspot.de/2014/05/the-remote-server-returned-error503_7.html
Note: If you find a different solution, please report it as a comment to this post. This will be useful to the SharePoint Community. Be sure to double-verify it: undo your solution and verify that the problem comes back, then redo it and verify that the problem goes away.