why do network drive mappings disappear

We have an AD setup.  Server 2003, windows XP SP2, several network drives are mapped during logon.  For some reason, H keeps defaulting to the root of the share, instead of their home folder.  This is also specified in their account profile on the DC, but I have some ( not all ) users who when they log in, have all the other network drives mapped, but not their home drive.  Home drive keeps mapping to root of share.  H is supposed to map to \\server\users$\username, but instead maps to \\server\users$  Since users keep their email archive on this drive ( so it gets backed up ) this is starting to create problems in the morning when they log in, since they often can't see, or open their archive folders.

Why is H not mapping properly?
kburmasterAsked:
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giltjrCommented:
Do any events show up in the event log on both the server and the users computer?
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kburmasterAuthor Commented:
I'm not sure what ( or which category ) I should be looking at in the events log...  Could you be more specific?
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giltjrCommented:
I would look at the basic 3: system, security and application.
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JohnstonBCommented:
I had a similar problem for which the solution was to UNPLUG the tower thus removing parasite power from the NIC.
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camoITCommented:
Kburmaster

Is this happening to all users? Did this problem just start?
What process are you using to map these drives?

If you are not using a batch file, I can quickly whip up a formula for you to plug in server name and share.  Then deploy and see if you can map the drives.

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kburmasterAuthor Commented:
More background:  In AD users and computers, looking at the users, if you check the properties of any given user, on the profile tab, the Home Folder is assigned the letter H and mapped to a network location.  But sometimes, not always, and not any particular user, this drive mapping does not occur.  A network drive called H happens, but the mapping is not as specified on that profile tab.  Usually the root of that share instead.  So, instead of being \\server\share$\username, it is \\Server\share$

Just don't know why it's not getting mapped properly everytime they log in.  No apparent rhyme or reason.  And it doesn't happen with any of the other network drives.  I can even map this manually, but it doesn't always stick.  All network drives map to same server.
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giltjrCommented:
IIRC we saw this problem when some how the user lost access to their "username" directory.
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kburmasterAuthor Commented:
YES.  The mapping to their user directory is not being created 100% of the time.  Why does this happen?
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giltjrCommented:
When we saw this some how the permissions on their home directory got changed and their user-id no longer had any (no read, no write) access authority to their home directory.

Once their permission were corrected everything worked fine.
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JumpindogCommented:
I have this issue as well.  
Anybody have any other thoughts?
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