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AD/Exchange/Network issue

Last Modified: 2012-08-31
I have a strange problem out at a site I'm trying to troubleshoot and it's getting a little confusing where I should be looking.

It started off a few weeks ago where randomly MS Outlook would start disconnecting from the exchange server.  Even when users were connected via cable on-site this was still happening.  I cannot reproduce this fault but I have seen it happen with my own eyes.  this is an on-going issue we are having problems with.

Now I have users not being able to connect to their home drives properly.  In the attached image we have shares/home drives setup so users can go to \\company and see their shares.  Now randomly this isn't working for some users, only two so far, and they are getting the error in the image.  I managed to get this error after trying to rename a file in that folder, as you can see you can see the folder but when trying to manipulate inside the folder it there are issues.  Now the weird thing is i can use the server name \\company-server1\sales\wendy and everything works fine.  I hope this is making sense.

Should I be looking for issues on my domain controller, exchanges server, file server or all of the above?  Also I have checked and DNS seems to be working fine.  Do i have multiple problems here or maybe one problem (AD for example) causing these issues?
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