Is it just me, or is the fact that there is not only a solution, but not even a expected date for it? I have been following posts here since December 2006. This is the only issue keeping 25,000 users from being upgraded! - someone please help me.
It is currently supported in MP 5.4 165 but not with Exchange 2007...it is supported if all you have a mixed cluster with Exchange 2007 and 2003 and all MP servers and Outlook 2007 with MP clients are pointed to Exchange 2003.
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.