I have installed the OWA on a separate machine to my Exchange server. I have set my IIS virtual directory called Exchange to:
d:exchsrvrwebdatausa Document = default.htm
When I point my browser to http://mywebserver/exchange, I get the following error:
Microsoft VBScript runtime error "800a01a8"
Object required: "Application(...)"
/exchange/logon.asp, line 12
There are two known and documented problems that can result in this same exact error message. See KB articles Q279834 and Q248718 for details on both issues, including step-by-step instructions for resolving the problem.