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I've configured an AD-DS with two user accounts. then I logged in to these accounts using my laptop separately. But after server shut down still I can logged in to these two accounts using client machine. why is this happen ?

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Cached Credentials. – jscott Oct 12 '12 at 16:50
up vote 3 down vote accepted

Windows caches (stores a local copy (of the hash)) of your AD credentials for just this situation. If you are part of a domain but want to use your laptop when you aren't connected, the cached password lets you log in.

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So what do I need to avoid this ? – Isuru Oct 9 '12 at 10:42
@ISuru You don't want to, actually, but I believe you may be able to set the number of remembered logins to 0 in the GPO that controls this setting. – HopelessN00b Oct 9 '12 at 11:19

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