From PDI-
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migration from CUWL BE 6.1 to CUWL 6000 should be done:
BE5K CUWL -> BE6K CUWL
a. Purchase UCS C220 M3 and VMware software (customer can re-use existing MCS 7828 as backup call-processing server).
b. Purchase “UWL-MIG-CUWLBE-STD” migration SKU for required number of users ( located under CUWL-LIC-STD-K9).
c. Install UCM and Unity CxN and re-provision user configuration data on new server (request license re-hosting for CUCM and UCxN from licensing@cisco.com).