thank you Philipp Lucas, I saw this article, I see two controls Call http Web Service and Web request in nintex 0365 and I'm looking several examples about these actions (for web services). Do you have any example about web services with attachments?, I mean, I want to obtain the name about the attachment. In the version 2013 I can do that (https://blog.sprider.org/2012/04/03/read-list-attachments-from-sharepoint-list-item-using-nintex/ ), but in this new version, I need to find the way to do the same.
Have a nice day
You should be able to do the same in SP-Online as Microsoft offers the same web Service like in 2013: https://msdn.microsoft.com/de-de/library/office/websvclists.lists.getattachmentcollection(v=office.1...
If you need a complete example with screenshots etc. you have to wait. I won't be able to provide this before next wednesday, sorry.