HTTP 401 when accessing SharePoint

When accessing SharePoint, users would get an error message, saying that the page cannot be displayed.

On the SharePoint Server in the IIS logs, the error code 401 — Access denied would be logged. The username is not part of the log entry.

Oddly enough, this happened only on one Web Application, all others were fine.

The solution could be checking the credential manager and remove outdated credentials from the Windows vault.

In this case, old credentials (old password) were saved in the vault and the user was not able to logon to that WebApp.

Remove stored passwords, certificates, and other credentials

#sharepoint