I am using Windows 2008 Server with Exchange 2007, every thing has been working godd, but after about 4 months of working fine, the outlook 2007 clients form remote are asking for login usernames and passwordd.
The client can enter the correct username and password but exchange will not connect. Give the server about an hour or two and they will start connecting like normal with no problems. This is only effecting the external users, internal users are not having the issue I cannot find anything in the event logs nor the server settings that would cause this problem. When the problem is happening the users can log into the OWA and work with no problems, and authenticate with no prblems, but the outlook clint will not.
Outlook 2007 client are connecting with the following settings.
Connect to Microsoft exchange over HTTP
Proxy server for exchange https://mail.technologyplusonline.com
connect to exchange server with name in certificate --- msstd:mail.technologypluso
These connections will work fine with no errors for a long time then strat messing up. I do not have to make any changes for the problem to fix itself after a period of time.