Upgrading FIM to MIM on a new server

Hi,

I'm upgrading a FIM environment on Server 2008 to a new MIM environment on 2012.

I've installed MIM SP1 on the new 2012 server and copied the FIM database up to the new SQL server. It was my hope that I could re-run the MIM installation in either "change" or "repair" mode to update the database but the installation returns an error that the database version isn't the one that it was expecting.

The only workarounds I found were:

1. Uninstall MIM and re-install completely against the FIM database.

2. Update the database version in the fim.Version table to allow the "change" installation to proceed. (This is probably unsupported and I'm not sure if it would do all of the DB updates that MIM needs, but the portal and sync seem to be fine.)

3. Haven't tried this yet, but I could upgrade the FIM environment to MIM and then move the databases over. (Though the client is a little cagey about this approach.)

Is there a better approach that I am overlooking?

Thank you for any ideas.