This read-only integer reports the number of entries in the acquired database that the bridge has learned dynamically through normal address learning, as opposed to manual configuration. An admin watches this value to gauge how much of the total table is consumed by organic learning versus static entries, which helps when diagnosing why the acquired database might be filling up faster than expected. For example, a sharp increase in acqDynEntries after connecting a new switch stack full of previously unseen hosts would explain rising overall database usage without any manual configuration changes.