Hi pisko1979,
Since i am using FOSS Edition i followed the below document to upgrade.
But, This document common for both FOSS and NE.
Moving ZCS to Another Server » Zimbra :: Blog
And, also i am installed ZCS 6.0.6 in different server. i done two activities one is migration to new server and another is upgradation of ZCS-5.0.10(FOSS) to ZCS 6.06(FOSS) Edition in new server.