I have a Unity server 4.2.1. The SA page opens up blank instead of prompting me for a login. Although the browser says "Done," the Windows icon is still moving like it's going to refresh but it never does. Eventually, it will say "page can not be displayed." Also, the Gather Unity System information utility doesn't open up either. Other Tools Depot utilities open up. This only happens periodically, maybe 50% of the time. Otherwise, the admin page opens with no problem.
When I get the blank page, I have to reset the WWW service to get it working again. When I do that, the Gather Unity System information utility opens up as well, and the SA page prompts me for a login. I can login after that. I will be able to login for a while thereafter. But, after a period of time, the screen will go blank again when I open it up.
The Exchange server, Global Catalog is always reachable. I put entried in the host file but it didn't help. Any other suggestions? Thanks.