Existing Server/Exchange 2003 environment. New 2003 R2 x64 server fully patched and updated with no other apps installed attempting to install Exchange 2007 SP2.
Initially I was getting the error "Could not find the default Administrative Group ‘Exchange Administrative Group (FYDIBOHF23SPDLT)’". This I fixed by completely uninstalling per this Microsoft article,this Microsoft FixIt article and this recommended blog post, ending withsetup.com /preparead. I'm making progress, because now I'm getting a new error attempting the install. Specifically, Hub Transport installation fails with "Read only MultiValuedProperty does not support this operation."
Executing setup.com /prepareSchema fails. I've set the msExchVer attribute for CN=Offline Address Lists to 4535486012416 and gotten no change, the install still fails. This Googled page exactly describes my problem, and all anyone could say was to add this version number. It doesn't work. Pretty much none of the threads I've read have a resolution beyond this. I'm stumped, any help would be greatly appreciated.