With your Management servers installed, we need to now concentrate on installing the OpsMgr Reporting server role. For this, you will need to have a server running SQL Server Reporting Services (SSRS) in Native Mode. This SSRS instance will be used exclusively by OpsMgr and cannot be shared with any other products due to the security model it operates within.
Tip
Prior to installing the OpsMgr Reporting Server role, the SSRS instance should be pre-configured in Native Mode. This is the default option selected for you when you deploy SSRS on the same server as the Database Engine Services feature and the SQL installation wizard will automatically configure SSRS in Native Mode for you. If you chose to not install SSRS on the same server as the Database Engine Services instance, then you will need to use the SQL Reporting Services Configuration Manager to manually configure the server for Native Mode.
Here's what you need to do to get the OpsMgr Reporting server...