There are many forums suggesting to set the installation account (administrator account) as a filtered disconnector. The following is one of them.
http://blog.msresource.net/2012/03/27/make-the-installation-and-fim-ma-accounts-filtered-disconnectors-and-save-yourself-a-headache-and-possibly-a-rebuild/
In my environment, the installation account will be set as filtered connector. i.e. the account is linked to AD. A fimma FS would delete the MV. How can I still preserve this account?