Outlook 2010 continually asking for exchange password

I have some users on my network that are continually asked for login details in outlook, one of the PCs has had windows re-instaled but the issue still continues. The computers are connected to a domain with sbs 2011 server.  this problem has only arison in the last week, they used to work fine?? anyone got any ideas??


cheers Rob
pcspcs2011Asked:
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pcspcs2011Author Commented:
for some unknown reason it turned out to be a faulty switch?? still not sure why but has worked ever sinse we replaced it
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Jim Dettman (Microsoft MVP/ EE MVE)President / OwnerCommented:
I've bumped into this...it happens in two ways:

1. If the server is rebooted since their last login, which invalidates the authentication they had.  They start getting prompted.

  To check if this is what is going on, have them log out and then log back in.  If Outlook works without prompting, then that is the issue.

  I ran into this with users that were leaving their stations logged in all the time (not logging out when going home), and reboots would occur over weekends because of updates that were applied.


2. If these users are remote and working over slow network connections, Outlook may be trying to connect over the internet to the server.   In this case, the default security is such that you get prompted for credentials each time.

 To solve that, even though they are on the network, install the security certificate for the server on the client (you can do this through the internal web site in SBS, which has a link, or create an install package and put it on a drive somewhere).

 When they go to connect, the certificate will be used to identify the computer as trusted to the server and they won't get prompted.

 If you need more details. le me know.

Jim.
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yo_beeDirector of Information TechnologyCommented:
Do you have an Exchange Cache mode enabled.
The OST might be out of sync?
If so I would delete the OST and see if this resolves the issue.
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pcspcs2011Author Commented:
this has fixed the problem
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