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Asked: 2026-05-19T16:39:25+00:00

I wish to obtain the domain SID from a user account that has been

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I wish to obtain the domain SID from a user account that has been used to access my web page, but…

In some instances, you dont have access to the HttpContext object to call HttpContext.Current.Request.LogonUserIdentity.User.Value

All the static function is able to accept is a user-name as a string, and a domain-name as a string.

If the domain is left blank, it is amused that the user account name is within the same domain as the IIS server that the process is executing upon. :/

your help would be most appreciated as always.
Cheers.

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  1. Editorial Team

    To get the a user’s domain, you can use LookupAccountName. In case you need a pinvoke sample, get it from pinvoke.net

    You pass in DOMAIN\UserName to the function. The LookupAccountName function will give you back the user SID and the domain name.

    I suspect that you don’t really need to know the domain SID. I would think the returned domain name should be enough for you. If you really want to know the domain SID, you can extract it directly from a the returned user SID.

    A user SID is always starting with a domain SID. For the details of how a SID structure looks like and how to extract the domain SID, please check here

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