You can modify the frequency, replication options, Snapshot copy retention settings, or scripts information while a policy is attached to a resource group.
Modifying SnapCenter Plug-in for VMware vSphere backup policies in the VMware vSphere web client differs from modifying backup policies in the SnapCenter GUI. You do not need to detach policies from resource groups when you modify policies in vCenter.
Before you modify the replication or retention settings, you should consider the possible consequences.
Backups continue to accumulate until they reach the new setting.
Backups in excess of the new setting are deleted when the next backup is performed.