Losing mapped drive

We have a new domain with two 2012 R2 GC servers. We moved a 2003 server from the old domain to this new domain. The 2003 server has a share that is mapped via group policy. At times, (no pattern discovered although it is usually noticed in the AM), some users will lose connectivity to this mapped drive. A logoff/logon or a restart will reconnect the drive. All power save settings are turned off. Anyone else experience this?
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Joseph MoodyBlogger and wearer of all hats.Commented:
How are you mapping the drive in Group Policy? Logon script? GPP Drive Mappings? User Home folder?

If you use GPP Drive mappings, make sure that you have reconnect enabled.
korona102Author Commented:
I'm using a GPO to map the drive. See image.
Joseph MoodyBlogger and wearer of all hats.Commented:
Looks fine. Do you have anything under the common tab?
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korona102Author Commented:
No, nothing is checked.
korona102Author Commented:
I have other drives mapped the same way that work fine. The only difference is that this is the only share coming from an 03 server.
korona102Author Commented:
Any other ideas out there please?
When the user stats they are disconnected from the mapped drive are they seeing this in Windows Explorer. Windows will mark a mapped drive as disconnect even though it is not if the drive is not access for a period of time

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korona102Author Commented:
Yes, in Windows Explorer. And it is not accessible. The user has to log off and back on to get it back.
Any errors on the client or server?
Does it happen when you map the drive using the IP or FQDN?
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