ConfigMgr/OpsMgr : SCCM Patching and OpsMgr Maintenance Mode
Customers using OpsMgr for monitoring and SCCM for patching commonly select the option in SCCM to put MOM/OpsMgr agents in maintenance mode during patching – or even with standard software distribution.
Steve Rachui's Manageability blog - ConfigMgr/OpsMgr : SCCM Patching and OpsMgr Maintenance Mode