How Autodisconnect Works in Windows NT and Windows 2000:;EN-US;138365
Mapped Drive Connection to Network Share May Be Lost:
Mapped drive shows an X – Super User:

One of the visually annoying things in the WinNT stack is how mapped drives “fall off” the network with red X’s but they don’t really fall off.

So how can you get rid of this slight visual annoyance? 

A registry key I’ve stuck on all my servers that have mapped drives.

At the command prompt with the following command:  net config server /autodisconnect:-1


HKEY_LOCAL_MACHINE under the subkey:

Then you get happy green connections and no Red X’s.

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