Introduction
By default, the maximum number of access proxies in an access proxy array in Microsoft Lync Server 2010 is 10. The number of incoming connections that an access proxy can accept from a single federated partner is 80.
Note Each access proxy can create up to 8 incoming connections.
More Information
After you apply the following update, the maximum number of access proxies in an access proxy array increases to 256. Therefore, the number of incoming connections that an access proxy can accept from a single federated partner is 2048:
2500442 Description of the update for Lync Server 2010: April 2011
