I'm getting ready to upgrade from Unity 4.0(3) to 4.0(5) (so I can use COBRAS)in preparation to go to Unity 5.x. The reason for this is to move Unity to new hardware running Windows 2003 server. My question is will this upgrade require extending the Active Directory Schema since it is an in place upgrade? Thanks.
If you look at the reconfiguration and upgrade guide to upgrade Unity 4x to the shipping version here
You see there is a link Extending the AD Schema for Cisco Unity.
You should be referring to the install guide if this is not a new install
Upgrading Cisco Unity 4.x Software to the Shipping Version
It's mandatory to always extend the schema whenever you upgrade or add a server with a higher version.
if this helps, please rate