Hi, Thanks for the post. OME takes care of the upgrade process and no data loss happens during the upgrade but it is better to take a back up of the database for cases if something goes wrong. You can launch the SQL management studio and from there right click on the OMEssentials database and create a back up of the database.  Keep it safe. Launch the OME 1.2 installer, it will prompt you to install if any pre-requisites are required and then should automatically detect the older database and ask you to take a back up. Once back up is there, move ahead with the installation. You can take help from this whitepaper as well: [URL] 
Hey everybody, Newbie question....What is the process for upgrading to 1.2 without any data loss?
Upgrade OEM from 1.0 to 1.2