Pre installation steps:
Understand the management server action account:
Can be specific as a local system account or a domain user account, with domain user account preferred
This account is used to gather data and perform actions on your management servers.
Recommended: use a domain user account
---- appropriate permissions will be assigned during the setup process
-- this account should be installed before installing scom
Create an AD operations manager administrator group
Place into this group the accounts the users that will be allowed to manage all aspects of operations manager
Add the domain user you have created to local administrator group on scom and database server.