Instant recovery operation is not complete due to NFS mount limit exceed
An instant recovery (IR) operation creates at least one NFS mount. If the number of NFS mounts exceeds the default limit, the next IR operation cannot succeed.
NetBackup™ Plug-in for VMware vSphere Client (HTML5) Guide · PDF
An instant recovery (IR) operation creates at least one NFS mount. If the number of NFS mounts exceeds the default limit, the next IR operation cannot succeed.