Multi Site with Distributed Messaging

Edit: Actually I just noticed the UC clustering does not function the same as CM clustering. I'll have to bring up another Unity Cluster and configure the Unity Connection Sites. I've been going over the Networking Guide for Unity Connection but I'm not sure if we are licensed for this.
"We currenlty have a CUCM 9.1 cluster with CM pub/sub, UC pub/sub, and CUP pub/sub. We are going to add another site to this deploy. I've brought up 2 CM subs at that site in the same cluster that will handle call processing and tftp but I'm not sure about the UC part.
After bring up 2 UC subs, is the distributed messaging piece as simple as configuring another hunt group on the CM side and setting up another mailbox store and port group on the UC side?"
Thanks!
"We currenlty have a CUCM 9.1 cluster with CM pub/sub, UC pub/sub, and CUP pub/sub. We are going to add another site to this deploy. I've brought up 2 CM subs at that site in the same cluster that will handle call processing and tftp but I'm not sure about the UC part.
After bring up 2 UC subs, is the distributed messaging piece as simple as configuring another hunt group on the CM side and setting up another mailbox store and port group on the UC side?"
Thanks!
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CUCM SRND 9x/10, UCCX SRND 10x, QOS SRND, SIP Trunking Guide, anything contact center related