VMware backup is not running on its Vcenter

Hi,

I have one VMware type policy with selections of client automatically through query. I have 4 VMs daily running on this policy with ABC as Vcenter host.

Today, there was an another XYZ Vcenter host which was not connected and my backup of this VMware policy gets failed with error code 4234. I am wondering that if this policy needs ABC Vcenter credentials  (Datastore resides in this VM), why this policy is getting failed when an another Vcenter(XYZ) is not connected.

Please help me.