XP machines randomly loose map drive connections

[msthac01]

I run a small office of about 65 pc's with 2 server running as domain controllers. What happens is randomly people will lose their connections to their mapped drives which also stores the information for a particular program that is immensely important to their daily jobs. When they lose their connections I usually reboot a couple of times and eventually they reconnect and get their drives back through the logon script. Whenever the logon script fails to map the drives it gives the error -- "System Error 1396 Logon Failure-The target account name is incorrect" Any suggestions on what could be going on?

[chicagotech]

Any errors in the DC Event Viewer? Or chekc this link.

System Errors
System error 1385 has occurred - Logon failure: the user has not been granted the requested logon type at this computer System error 1396 has occurred ...
www.chicagotech.net/systemerrors.htm

[msthac01]

I see errors in the dns event viewer, event ID's 4004, 4011 4015 see different ones at different times. Just weird because after several reboots it eventually establishes the connections and everything is fine.

[chicagotech]

This is some things to do with the DNS settings. I would check the DNS settings first. Or give us more details about your DNS. This link may help too.

Event ID Troubleshooting
Event ID 4000 - The DNS server was unable to open Active Directory. Event ID 4004 - The DNS server was unable to complete directory service enumeration of ...
www.chicagotech.net/wineventid.htm

[msthac01]

I checked out the link you provided and tried using the netdiag and dcdiag as it suggested to find any problems. I couldn't get the netdiag to work it kept giving me the error "---------------------------
NETDIAG.EXE - Entry Point Not Found
---------------------------
The procedure entry point DnsGetPrimaryDomainName_UTF8 could not be located in the dynamic link library DNSAPI.dll.
---------------------------

When I ran dcdiag test everything passed except the following section: frsevent, it said there were errors in the event viewer within the last 24 hours after the SYSVOL has been shared.

I checked the event viewer and found the following event 13508. The same event shows up on the other DC as well. Apparently there is an issue with the File Replication Service between the 2 DC's. I checked and the service is running on both DC's, I really don't know what else to check. Need any more info just ask, thanks for any help.

[chicagotech]

1. You may want to check this post. Solved: NETDIAG.EXE - ENTRY POINT NOT FOUND
http://www.chicagotech.net/netforums/vi ... php?t=2168

2. Yes, it is RFS issue. These links may help.

Sysvol not replicating with Event ...Event ID Troubleshooting Event id 13508 - The File Replication Service is having trouble enabling replication · Event ID: 13550, 13552 and 13555 - The File ...
www.chicagotech.net/netforums/viewtopic.php?t=988 - Similar pages

Event ID Troubleshooting
Event id 13508 - The File Replication Service is having trouble enabling replication · Event ID: 13550, 13552 and 13555 - The File Replication Service ...
www.chicagotech.net/wineventid.htm