Outlook 2007 and 2010 asked continually domain password with exchange 2007.
We have migrated from exchange 2003 to exchange 2007 SP3, our exchange server 2003 is already degraded.
Since we have migrated the outlook 2007 and 2010 do not stop asking for a password for the domain, but you give the password to remember the outlook is asking for one.
https://www.experts-exchange.com/questions/28335230/Autodiscover-every-few-minutes-in-outlook-with-exchange-server-2007.html
It is caused by Autodiscover in most cases - primary reason is not having a trusted SSL certificate.
Simon.