In scenarios where there are multi-value enabled columns, I would check the option "Expand Related Entities" while creating the base view. In case, if this option is checked, the references to other entities would appear directly in the main entity as [arrays or registers](https://community.denodo.com/docs/html/browse/latest/vdp/administration/creating_derived_views/creating_flatten_views/creating_flatten_views).
You could take a look at the Knowledge Base (KB) articles [Microsoft SharePoint as data source](https://community.denodo.com/kb/view/document/Microsoft%20SharePoint%20as%20data%20source?category=Data+Sources) and [How to connect Denodo to Sharepoint Online using OData with OAuth authentication](https://community.denodo.com/kb/view/document/How%20to%20connect%20Denodo%20to%20Sharepoint%20Online%20using%20OData%20with%20OAuth%20authentication?category=Security) for more information. Also, you could refer to [Denodo OData2 Custom Wrapper - User Manual](https://community.denodo.com/docs/html/document/denodoconnects/latest/Denodo%20OData2%20Custom%20Wrapper%20-%20User%20Manual#h.fj64zz50lz0a) to know more about the features, limitations, etc. about the wrapper.
Hope this helps!