Dynamics 365 Sharepoint server based integration content types + mandatory metadata

Hi, 
We are testing out the OOB Dynamics 365 and Sharepoint integration. Both systems are online. We ran in to a bit of an issue. Is it really not possible to have the system prompt for mandatory fields when adding documents through Dynamics 365? 

When opened in SharePoint then we can see that the documents are missing mandatory fields, but in Dynamics 365, everything looks fine and no need to add any data to mandatory fields. How can this be? 

If there isn't a standard way to do it, maybe someone has found a custom/code way to solve this issue? 

Br, Vivian