Situation

DNS load balancing supported?

DNS load balancing recommended?

Hardware load balancer (only) recommended?

All or most users homed in the pool run Lync Server 2010 clients

Yes

Yes

Many users homed in the pool still running older clients

Yes

Yes

Interoperates only with other servers running Lync Server 2010

Yes

Yes

Interoperates with many servers running earlier versions of Office Communications Server

Yes

Yes

Running Exchange UM with Exchange 2010 SP1 (or not running Exchange UM)

Yes

Yes

Note: DNS Load Balancing and Hardware Load Balancing setup for web traffic only is not included in this guide.