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Asked: 2026-05-16T01:21:56+00:00

My colleague changed his user logon name in Active Directory today in order to

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My colleague changed his user logon name in Active Directory today in order to match a new company policy for logon names.

On his machine, the %username% environment variable now shows the new logon name.

Our intranet, which uses Windows Authentication (NTLM) is still reporting his the old username (through Page.User.Identity.Name).

I am aware that ASP.NET can cache user credentials, but we have stopped and then restarted the app pool but still have this symptom.

Can anyone advise what might be going on?

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1 Answer

  1. Editorial Team

    This is an issue caused by SID caching on the web server. The WindowsPrincipal is retrieved from a cache, the only way to clear the cache is to reboot the web server machine. There are some code changes you could apply(to retrieve using Windows API), but I would recommend just a quick reboot.

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