I’ve ran into an issue where I couldn’t install SCOM 2012 SP1 agent on a server. I was getting the following error:
The System Center 2012 – Operations Manager agent cannot be installed on a computer on which the Operations Manager management server, gateway server, Operations console, operational database, web console, System Center Essentials, or System Center Service Manager is already installed.
The server had OpsMgr and SCSM consoles installed because it was Orchestrator server. To resolve my issue I had to remove both consoles in order to be able to install the OpsMgr agent. I’ve removed both consoles installed the agent and than installed the consoles again.
I cannot remember having this issue with SCOM 2007 R2 but definitely had it with MOM agent 2005 and MOM 2005 Consoles. It will be better if such dependencies are removed in System Center vNext.