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Does XP Pro cache domain users passwords?

Posted on 2004-08-26
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Last Modified: 2008-03-06
I am setting up some XP Pro PCs that are for users that will log onto the domain but be in a remote office connected by a VPN over the interent.  I know there will be some times when the connection will be down and they wont be able to connect to the domain controller, but i still want them to access their machines.
I did a little test and it seems once a user logs on to a machine once, the machine caches the password.  I then disconnected the PC from the network and tried to log in again and was able to.  Of course no network resources were available but the user was able to log into the machine so it must store the users password locally.  I tried reconnecting, logging in as another user and then disconnecting the machine from the network again.  Now while disconnected i was able to log in under both user names, so i dont think that only the most recent logon username/password combo is cached.  

Can anyone confirm that all domain users who logon to an XP Pro machine have their credentials cached locally on that machine so they can log in again even if the machine is not connected to the network?
And if anyone has some links to more info on this that would be helpful too.

Edited to add - They are logging on to Windows 2003 Server with AD

Thanks,
Tom
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Question by:saunaG
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LucF earned 2000 total points
ID: 11902607
Hi saunaG,

This is true, winXP can use cached credentials to be able to logon even without the network connection. Also roaming profiles are cached locally to be able to access those.
And there's enough for you to worry about, please see this:
http://support.microsoft.com/search/default.aspx?InCC_hdn=true&QuerySource=gASr_Query&Catalog=LCID%3D1033%26CDID%3DEN-US-KB%26PRODLISTSRC%3DON&Product=winxp&Queryc=cached+credentials&Query=cached+credentials&KeywordType=ALL&maxResults=25&Titles=false&numDays=&InCC=on

There are a lot of ways cached credentials can fail, but if you keep winXP up-to-date, you're pretty safe using them.

Greetings,

LucF
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