Issue description:
AX 2012 R3 – A user cannot sync to a Document Template Library with federated authentication
and no error message displays,but If you are logged into SharePoint site and try attaching the file then,
it works fine.
Workaround suggestion:
Setup is completed following the article below:
This a known issue and the logon prompt was remove when you are accessing the SharePoint Online
through federated access.
You need to logon to SharePoint online in a browser in order to generate the cookie cache
and fix the synchronization issue.
If you are not using federated authentication, where users have a direct connection to SharePoint Online,
then Dynamics AX client will get a normal logon prompt, and complete a basic authentication over SSL.
Writer: José Luis Alvarez Mesa <jalvarez@microsoft.com>