Dear Savage, many thanks, I tried that, but wasn't able to do that. So it would be good to see it and get it explained :-). I bought an own business MS365 account for that, so it should work. But it is also quite complexe. My aim is to develop small canvas apps with collections, that can be downloaded from other users. So they should use stand alone versions without having MS365 account. Do you have experience in this? I'd really love to hear whether that is possible.