Collaborate Feature not available in Document Cloud Files
Collaborate Feature not available in Document Cloud Files, it is available in Creative Cloud files. Please include this option
Also there are no Shared PDF option, where in we can store a PDF on cloud and have a team to work on it. Just like in Foxit Or Sharepoint
Thanks for reaching out to us. For supporting collaborative viewing of PDF, Acrobat has come up with Send for Review option via the share button where the PDF is stored on the cloud and the team can add comments which will be visible to other users also with whom the file is shared.