When attempting to add the Master server to the vCenter plugin it fails with "java.lang.Exception: Failed to communicate with server using supplied auth token. Error: java.lang.NullPointerException. Please verify that NetBackup Master Server name, port and auth token are valid", when bad certificates are provided.
This issue occurs when a bad authentication token certificate has been provided to the vCenter Plugin. For example if the zip file is extracted an provided to the vCenter plugin, that would cause this issue. The vCenter plugin expects the zip file to be provided as the certificate.
Create a new authentication token following procedure to "Create an Authentication Token" on Page 40 of the "Symantec NetBackup™