In large proxy deployments, the proxy may be located in a different building to the Domain Controller (DC) infrastructure. In such environments, it is advisable to install a BCAAA server as close to the DCs as possible, for a number of reasons.
To further help reduce latency issues, it is recommended that the BCAAA server be located within the same subnet as the DCs and, preferably, one the same switch.
Note: Even if the BCAAA server is located next to multiple DCs, it may still be necessary to configure BCAAA to communicate to one specific DC (see 000009829).