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w2k8 r2 network drives disconnecting when not in use

I noticed that all mapped network drives are getting disconnected after being idle for some time. Small red X is present on all of them, it takes a single click to reactivate them. All drives are set up on Windows 2008 R2 64-bit server, clients are Win7 and WinXP.
Is there a setting that would keep them connected at all times? Appreciate any help.

Thank you

Nat Wallis

Check your power management settings as the computer maybe going to sleep and that is why it is dropping the connection.

In device manager you also have specific controls just for your NIC if you need your power management enabled.

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naughtynat:

it happens during business hours, employees may be working in Excel while all drives gets disconnected. It was not an issue with Windows 2003 servers, after we switched to w2k8 r2 problem occurred on all workstations.

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Darius Ghassem

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ocanada_techguy

OR you may be exceeding the CALs, depending if it's licenced by seat or by server. If by server, say licensed for 10 connections, the 11th connection kicks off the 1st, the 12th causes the 2nd to drop, refresh reconnecting the 11th causes the 3rd to drop, and so on.

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ASKER

dariusg:
Thanks for the fix, it was it

ocanada_techguy:
It wasn't the case here, there are few extra cals in place, it was a good guess though.