Avoid access to smartsheet when request for update
First of all, english is not my native langage, please excuse my mistakes.
I have a smartsheet with several external counterparts (customers and providers). I manage the smartsheet which is not shared and nobody is able to reach / open it.
I send requests for update with automatic processes. but when counterpart receives confirmation, a link to the smartsheet allows him/her to open it.
So all my work is ineffective.
Please help me otherwise I have to re think the whole architecture and it could be very complexe.