Microsoft has just updated KB Article 2831166:
Installing Microsoft BitLocker Administration and Monitoring (MBAM) 2.0 fails with “System Center CM Objects Already Installed”
Symptoms
Consider the following scenario:
· Microsoft BitLocker Administration and Monitoring (MBAM) 2.0 is installed in a System Center Configuration Manager Integrated topology.
· MBAM is uninstalled from the System Center Configuration Manager server.
· You attempt to reinstall MBAM on the System Center Configuration Manager server again.
In this scenario, the MBAM installer fails during the prerequisite check with the following error:
System Center CM Objects Already Installed
Full details: