upgrade from 9.1 to 12.0

[bezra_012]

Hello,

i'm planning to upgrade cucm from version 9.1 to version 12.0  on BE6000-M5 , it it direct upgrade or it is required any cop file , i try to search for document didn't find if any one have document or did it already please share the steps. 

Thanks  

[Jaime Valencia]

DUPLICATE 

https://community.cisco.com/t5/unified-communications/upgrade-from-9-1-to-12-0/m-p/3846402