This read-only Counter32 holds the high-order 32 bits of a 64-bit exceeding-bytes counter for the subscriber, used with oaSubscrAccNmLowExceedingBytes to represent totals beyond a single 32-bit counter's range. Admins combine both halves to compute the full count of out-of-profile bytes a subscriber has sent when that total grows large. For example, a management application would read both this and the low-order counterpart together rather than relying on either alone.