PST files disconnect

HELP!
"Unable to display the folder. Microsoft Office Outlook could not access the specified folder location. The messaging interface has returned an unknown error. If the problem persists, restart Outlook. Access is denied. Make sure the disk is not full or write-protected and that the file is not being used.

I get this regardless if the user is on a Windows XP with Office 2003 or Windows 2000 with Office 2003. There mailbox opens fine and all my users have a personal folder (PST file) to store there old emails, etc. The location of the PST files have not changed (located on there home directory). For some users, they never have a problem, others report after being in outlook, say an hour or longer, and when they click on there personal folder they get the error listed above. If they close outlook and reopen it, it works fine again. I have checked our network connections and everything is fine, no dropped connections. I have searched KB articles till I'm blue in the face. I have found nothing that works. The only thing that has changed is all of our servers have now been upgraded to Windows 2003 Int servers. We are an entire Windows shop with all updates are applied within 24 hours of release

Any help on this issue would be greatly appreciated

 

learn to post and might make a worthwhile replay

could not access the specified folder location. The
messaging interface has returned an unknown error. If the
problem persists, restart Outlook. Access is denied. Make
sure the disk is not full or write-protected and that the
file is not being used."

Office 2003 or Windows 2000 with Office 2003. There
mailbox opens fine and all my users have a personal folder
(PST file) to store there old emails, etc. The location of
the PST files have not changed (located on there home
directory). For some users, they never have a problem,
others report after being in outlook, say an hour or
longer, and when they click on there personal folder they
get the error listed above. If they close outlook and
reopen it, it works fine again. I have checked our network
connections and everything is fine, no dropped
connections. I have searched KB articles till I'm blue in
the face. I have found nothing that works. The only thing
that has changed is all of our servers have now been
upgraded to Windows 2003 Int servers. We are an entire
Windows shop with all updates are applied within 24 hours
of release.

 

where are the pst living.
are you running outlook 2k3 in cached mode...

is anyone trying to share a .pst

are you running MX2k3?

the specified folder location. The messaging interface has returned an
unknown error. If the problem persists, restart Outlook. Access is denied.
Make sure the disk is not full or write-protected and that the file is not
being used."

Windows 2000 with Office 2003. There mailbox opens fine and all my users
have a personal folder (PST file) to store there old emails, etc. The
location of the PST files have not changed (located on there home
directory). For some users, they never have a problem, others report after
being in outlook, say an hour or longer, and when they click on there
personal folder they get the error listed above. If they close outlook and
reopen it, it works fine again. I have checked our network connections and
everything is fine, no dropped connections. I have searched KB articles till
I'm blue in the face. I have found nothing that works. The only thing that
has changed is all of our servers have now been upgraded to Windows 2003 Int
servers. We are an entire Windows shop with all updates are applied within
24 hours of release.