what are my options to import data into NAV2016 from Excel (or CSV or XML). If possible I would like to do this import via the Web- or WindowsClient.
For example I would like to import the Chart of Accounts.
Look up Rapidstart, that seams to be you best solution for the windows client.
You can find the video on youtube as well.
Yes RapidStart would also be my suggestion. It allows you to import XML and Excel files. RapidStart is designed exactly with that purpose of importing chart of accounts and other setup tables.
But they have to be in NAV's special format.
Dynamics NAV RapidStart videos on YouTube
After looking thru some videos this is definitely what I am looking for...