To upgrade Site Recovery Manager, you must perform several tasks in a specific sequence. You must complete all the upgrade tasks on the protected site first and then on the recovery site.
Note:
During upgrade, SRM is unavailable until you upgrade SRM and VR to the latest version 8.2.0.1.
You can no longer upgrade your VR and SRM VMs directly. To move SRM environments to the latest version, you must migrate them.
To know more about prerequisites, best practices, and the steps for upgrading Site Recovery Manager, see Upgrade Site Recovery Manager.