8.5 and Sametime

We plan to upgrade two existing Sametime servers in a Domino 6.5.5 environment to Sametime 8. We would like to upgrade the Sametime servers before we upgrade the rest of the environment. Can we upgrade the Sametime servers to Domino 8 without upgrading the address book or will we need to upgrade the address book and system databases first?

Subject: Upgrade path…

Per the following TechNote, you should 1st upgrade the Domino Administration Server & then other Servers:

Title: Supported configurations for Notes and Domino 8.x
Doc #: 1264690
URL: http://www.ibm.com/support/docview.wss?rs=899&uid=swg21264690

And from the following TechNote:

Sametime server requirements

Operating systems and supported platforms

Domino levels supported

Domino 7.x releases

Domino 8.0.x releases (32-bit only)
Note: To support IPv6, you must use version 8.0.x of Domino

Title: Detailed system requirements - Sametime 8.0.2
Doc #: 7013765
URL: http://www.ibm.com/support/docview.wss?rs=899&uid=swg27013765