This OID reports the internal numeric identifier that UCS Manager assigned to a MountDef object — the saved definition of one NFS mount (which server and export path it points at and what it is used for) that UCS can mount — for its own bookkeeping. An admin rarely needs this raw ID directly, but Cisco TAC uses it to cross-reference this exact MountDef instance against internal database records or trace logs when troubleshooting. For example, when escalating an NFS mount problem to Cisco support, providing this intId lets the support engineer locate the precise MountDef row in a diagnostic dump instead of relying on the DN alone.