AD timeout token

I am running windows server 2012 R2 as my domain controller, actually 3 of them, with DNS and DHCP.

I'm having mac clients having problems with permissions, so we're thinking the problem is with the AD timeout token, that after a few hours of the user stays logged in, the Macs are not automatically renewing the token.

Can someone tell me where would I find that configuration so I can change it to like 4 or 5 days?

Thanks....
DanNetwork EngineerAsked:
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Cliff GaliherCommented:
Active Directory uses Kerberos (an open standard) by default, and yes, Mac *still* doesn't really to long sessions in Kerberos properly.

With that said, extending the ticket time is a *TERRIBLE* fix (not criticizing, just informing.) It opens a pretty significant security hole to the point where the trade-off is rarely worth it.  Instead, you should make a minor change to the Mac OS to request ticket renewals more often.  In Mountain Lion and newer, it is relatively easy.

http://www.frameloss.org/2013/01/30/macos-kerberos-tgt/

One change, one time per machine, and you should see your problems dissipate.
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DanNetwork EngineerAuthor Commented:
will this work in Yosemite, as most of the client are on Yosemite.  I will give it a try
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Cliff GaliherCommented:
The last OS I've tested it with was Mavericks. But it should work.
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DanNetwork EngineerAuthor Commented:
thanks, I haven't tried it yet, but will do so next week.
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