Is there any problem to move all the existing subscribers(including the unity auto generated accounts/distribute list) from one OU to the other OU? Will there be any service impact, either during the move or after? (New subscribers will still be generated in old OU.)
Generally it is not a problem to move to a diffent OU. However if permissions are stripped for an OU, then unity accounts will not be able to make changes or access windows account, and exchange mailboxes.
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.