I'm building a form that user can choose an option Yes/No. If they choose Yes, they have to attach file(s) into attachment.
How can I do this in Nintex form for Office365?
Pls support. Thanks.
have a look on these examples how it is done on on-prem - https://community.nintex.com/search.jspa?q=getnumberofattachments
I'm not sure whether it will work on O365, but it might give you at least a hint what to look for.
this Blog Post could be also very helpful for you:
Retrieving data ...