After you upgrade the vRealize Automation nodes, upgrade the vRealize Business for Cloud server in Region A, and the remote data collectors in Region A and Region B.
Download the vRealize Business upgrade .iso file to a shared datastore for mounting to the virtual appliances.
If you have space on your NFS datastore, upload the file there.
Allocate 8 GB RAM and 4 vCPUs to the vRealize Business Server appliance.
What to do next
Verify that vRealize Business functions flawlessly after the upgrade. See Validate the Cloud Management Platform in the VMware Validated Design Operational Verification documentation.