If during the upgrade process of vCenter Server and the vSphere Replication appliance you changed the vCenter Server certificate or IP address, you must perform additional steps.
To update the vCenter Server certificate, see vSphere Replication Is Inaccessible After Changing vCenter Server Certificate.
You must update the IP address in the vSphere Replication Management Server when the vCenter Server uses a DHCP address that changed during the upgrade and the vSphere Replication Management Server is configured to use the vCenter Server IP address and not FQDN.
If vCenter Server uses a static IP address, it preserves the IP address by default after upgrade.
Prerequisites
Verify that the vCenter Server and vSphere Replication components are upgraded. For more information, see Order of Upgrading vSphere and vSphere Replication Components.