Installing Microsoft Office SharePoint Server 2007 (MOSS) onto a Windows Server 2008 R2 all went fine but when I attempted to create a Collaboration Portal site collection I was greet by the message:
The Office SharePoint Server Standard Web application features feature must be activated at the web application level before this feature can be activated.
After trying a few things I came across this:
http://social.technet.microsoft.com/Forums/en-US/sharepointadmin/thread/8b96663a-ed87-4ab4-bd59-33c7245a76d4
which basically confirms the issue and attributes it to the MOSS setup configuring IIS on Windows Server 2008 R2 incorrectly.
The solution? Re-install MOSS, only this time manually configure IIS before running the MOSS installation OR simply re-apply MOSS Service Pack 2.
Once I reapplied the service pack I could create the Collaboration Portal site collection.
CIAOPS 