This is the code flow
item = server.workbooks.get_by_id(book_id[1]) server.workbooks.populate_connections(item) print item.connections[0].id item.connections[0].server_address = 'server_address' server.workbooks.update(item)

When I re-request the same workbook, and query the connection server addresses, they have not been updated.

This appears to be caused by workbook.update() calling the Update Workbook endpoint, but not able to call Update Workbook Connection endpoint, and there isn't a workbook.update_connections (or equivalent).