Obtain a variable for a Microsoft forms survey link

We are creating surveys with Microsoft forms. We would like to distribute these surveys with a company (i.e. Cint).

This company (Cint) is asking us to obtain a "variable" in order to attach an [ID]-Capture at the end of the survey link (e.g. c=, guid=, respondent= and similar … ). They said the survey provider (Microsoft forms) could give me this information.

So my question is, could you give me this variable?