Hello,
I did some research and found a git branch (CONNECTORS-1247), but the last commit is 11 months old. Is the development of the Sharepoint REST API connector still in progress, or on hold? If there is some point we can support the development of CONNECTORS-1247, please let me know. We also have a Sharepoint 2013 test server (not available for the public, but we could use it for tests and feedback). Best regards, Mateusz