i new user for Trimble connect ,
i have a model on Tekla 2017 how i Upload model like Tekla2020 and make auto sync
If you are talking about synchronization of Tekla Structures with Trimble Connect, in 2017 you can already use the Trimble Connector (like in 2020) File menu> Import> Trimble Connect.
On the other hand the .tekla export is new in 2020. Until 2019 the Trimble Connector tool only allows you to export in IFC.