Mismatch in vCenter server name (uppercase vs. lowercase letters) causes the VMware connectivity test to fail
The Pre-Recovery Check screen of the NetBackup Recovery Wizards runs a number of checks on the vSphere environment that you selected for the restore. The VMware connectivity test fails if the case of the vCenter name in NetBackup credentials differs from the case of the vCenter name in vSphere. For example: the name that was entered for NetBackup credentials is uppercase, but the name in vSphere is lowercase
Note:
When the VMware connectivity test fails because of a vCenter name mismatch regarding its case, the failure can be ignored. Click and the VM recovery should succeed.
To prevent the VMware connectivity test from failing, delete the NetBackup credential for the vCenter and re-enter the credential with the correct case. For instructions on how to add credentials, see "Adding NetBackup credentials for VMware" in the NetBackup for VMware Administrator's Guide. Alternatively, you can edit the name of the vCenter server in vSphere Client to match the credentials that were entered in the NetBackup primary server.