I would like to know, if it’s allowed and technically possible to sync my mobile, a tablet, my notebook and my desktop-pc with the same sync2eM-Account (only one license).
SyncEM works with ActiveSync, the license allows to be used on once PC to sync the eM Client’s content for that PC. As for the client-side (your mobile), that is not affected or restricted. EM also offer a 60 day free trial of the Sync2EM: http://www.emclient.com/get-sync2em-a…
Give it a try.