Submitted by Juliano Correa on behalf of Daniel Hunziker
This one has been identified during MPS-15406 research.
Basically, customer needs to update the ModifiedBy and Modified properties on Sharepoint.
During the ticket we identified the following:
"it looks like Sharepoint commit in "batches"" for ModifiedBy property.
Now I understand what is happening. We use client-side code to update properties (so called CSOM), so each time we update a property, the Modified and ModifiedBy are set on the ExecuteQuery().
Conclusions: those properties could not be updated, this is not supported in current implementation. We need a separate task to do it.
Investigate if it's possible to provide this change request, and make these properties available to be used during SharePoint Sync