outlook prompts for password when connecting to exchange

outlook prompts for password when connecting to exchange
csaccoAsked:
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Neal58Commented:
exchange 2003, 2007 or 2010? check authentication methods used by the server and check the client matches these
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JlipkoCommented:
Here are a few possibilities:
1. If you have a domain, you must logon to your computer with domain credentials in order for you DC to authenticate the user in Exchange.  
2.  Another reason is you have the wrong password saved.  
3. A deeper reason could be the user name could need the domain suffix attached.  like:  mikeG@mydomain.com.
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csaccoAuthor Commented:
I have performed all of you suggestions.  This issue occurs intermittenly, maybe 3 times a day,  on 4 out of 30 users.

Clark
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Raymond PengSystems EngineerCommented:
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JlipkoCommented:
Is it always the same users that have the issue?  If not and it is radom it can be network conductivity - meaning they are losing their connection to Exchange and need to log back in.  I would look into the event viewer on Exchange to see you see any disconection issues.  If your Exchange server has 2 nics switch your static ip to the second nic to see if it has a bad card.   If it is the same personel I would look at their event viewers and see if you can find something there.  What do they have in common with their login, and what is different than the other users that connect without issue.  
FYI:  If you move the static ip, you need to put a different one in the current nic or disable the nic before putting in the ip in the new nic, if you don't you will have conflicting IPs and Windows will not allow it.  Hope this helps!
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