Upgrade IMP 9.1.1 to 10.5.2 and CUPC 8.6.3

Question

I have a customer that I will be upgrading CUCM 9.1.1 to 10.5.2 and IMP 9.1.1 to 10.5.2 very shortly.  My question is they are currently using CUPC 8.6.3 client on the IMP 9.1.1 server.  They are not using Jabber yet.  I cannot find an documentation as to whether CUPC 8.6.x is supported on IMP 10.5.x.  Anyone done this or have reference docs as to what the client side compatibility matrix is for CUPC and IMP 10.5.x
Thanks,
Dave

Answer 1

We document what we support, so, if the last release on the CUPC RNs says CUCM/CUPS 8.6, then that means anything beyond that release is NOT supported. You'll never find a doc that says this ones are supported, this ones are not supported. If a version is not listed, it means it's not supported.
Your current deployment is already not supported as you're on IM&P 9.1
http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cupc/8_6_4/CUPC_BK_R765011D_00_release-notes-for-cisco-unified.html#CUPC_RF_SEB5CBBE_00
The document for the product, is the one that has the final word, on this case, the CUPC docs.
Sometimes the BU doesn't update the docs and that's the reason for those kind of notes, just as plenty of docs still simply say CUCM BE without a 5K, 6K or 7K, that old reference means the current 5K when no other BE option was available and no need to make a distinction.