Here is an interesting one. Maybe someone with a little more IIS knowledge can explain this. I have a Server 2003 SP1 machine running Exchange 2003 SP1. I installed Exchange SP2 and OWA stopped working. Giving me the "Loading..." error. Well, I decided to delete the password (and leave it blank) out of the anonymous user (IUSR_machinename) accounts password field under "Authentication and access control" tab for the default website. Now OWA works. Is a blank password in an IUSR account a special circumstance? Why would the password change when installing SP2? I actually thought just deleting the password and closing out of the MMC and going back in would just put the correct password for the account in and I would have the little dots, but not so, it is still blank. I don't want to leave the account with a blank password, so I need to figure out what is happening. Any insight is highly appreciated