Before you upgrade the VMware Identity Manager virtual appliance offline, perform these prerequisite tasks.
Verify that at least 4 GB of disk space is available on the primary root partition of the virtual appliance.
Take a snapshot of your virtual appliance to back it up. For information about how to take snapshots, see the vSphere documentation.
If you are using an external database, take a snapshot or backup of the database.
Verify that VMware Identity Manager is properly configured.
Confirm that a VMware Identity Manager upgrade exists. Check the My VMware site at my.vmware.com for upgrades.