1. Check the upgrade path of the ePO (check whether ePO can be upgraded from 4.6.7 to 5.1.1)
2. Run the upgrade compatibility tool in 4.6.7 ePO server (tool can be found in ePO 5.1.1 setup) which creates migrate package
3. Backup required files and folders and copy the DB file and log file to another location follow the article McAfee KnowledgeBase -
4. Run upgrade compatibility tool and select target and import the migrate package in the new server .
5. Run ePO setup , the setup continues are normal upgrade
Thanks for the quick support, I'll try this out.