I’ve came to a situation where I was so close to format the front-end server for one of my clients as it won’t work fine in the OWA interface.
Basically, there was a big issue for the SSL, and it didn’t work till I removed the IIS and re-installed it totally. Ofcourse, I’d to re-install the Exchange Server 2003 and the SP2 for it. I guess I did a mistake some where while following the article (http://support.microsoft.com/kb/320202) and then get no help on the net for the issue, but found hundreds of people asking for a solution. Found tons of articles for Exchange 2000 but nothing of it would fix the issue till find this article which doesn’t appear in Google search (don’t ask me I’ve no idea why) http://support.microsoft.com/kb/910119/en-us
I wish others would find it useful and not waste the same time I did. I spent over 12 continuous hours, and left the client site at 5:00 AM where the temperature was less than 5 degrees outside, and had to come next day to finish it.

At one site of a customer, where running Exchange Server 2003 on top of Windows Server 2003, faced a problem with the IIS manager. The MMC console doesn’t find it, you cannot add the snap-in because it’s not there. Removing/re-installting the IIS is not an option because the E2K3 is there.

I thought there must be some DLL registration missing, similar to the Schema Admin add-in, where you need to manually register the schmmgmt.dll file (run regsvr32 schmmgmt.dll). So keep searching till found the inetmgr.dll under the %windows%system32inetsrv folder.