A "HTTP Error 503. The service is unavailable." Error Occurs When Loading Web Access 8.

October 15, 2012 | KB: 1013069
Web Access 8

Summary

When loading the Web Access 8 site, you may receive the following error message:

    HTTP Error 503. The service is unavailable.

More Information

This error can occur if the Web Access 8 application pool is running under invalid credentials. For example, if the application pool is running under a custom domain user account and the password is reset on that account.

Open Internet Information Services (IIS) Manager and verify that there is a valid process model identity for the Web Access 8 application pool. By default, Web Access 8 runs under the WebAccess8AppPool application pool.