A. The errors you report are caused by a problem with the Microsoft Internet Information Services (IIS) 6.0 compression. The problem causes static files to become corrupted and incorrect information to be rendered to the requesting client. A typical error is

Line: 15
Char: 30
Error: object expected
Code: 0
URL: https://domainname/exchange/user/Inbox/?Cmd=contents

You can download a fix for the problem at http://www.microsoft.com/downloads/details.aspx?amp;amp;displaylang=en&familyid=0bc9b5bc-a094-49bf-89a5-c8a2d32345a2&displaylang=en. You must apply this fix before you can upgrade to Microsoft Exchange Server 2003 Service Pack 1 (SP1).