Can someone tell me what all options are correct for this question?
Which two use-cases would require a third party integration?
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the second calls for a file storage solution. so systems which are made for that. Appian can deal with documents, but is not especially made to deal with a huge amount of (big) files, which is indicated by " an extensive number of large [...] documents over 7 years" The third - appian means collaboration within appian, especially not real time wise. (workflow oriented, step by step)