I want to upgrade CUCM from version 11.5 to 14SU3 but it failed. how can I troubleshoot it
I have uploaded dataexport ciscocm.DataExport_v4.0.cop.sha512 on CUCM 11.5 and initiate dataexport on cucm to import it files on the CUCM version 14 SU3. what does this error mean and for what belong ?
