Unable to Create N:N Relationships in Dynamics using Azure Data Factory

Hi,
Currently i see that we have only one operation available to Dynamics which is Upsert. When we don't map the GUID it will fail so i am geneating GUID using NEWID() in sql and mapping that to N:N Relationship uniqueidentifer with Reference GUIDS between Lead and Account. But the operation is saying that it does not support.Since it is upsert if the GUID is not found then it should allow to create the relation. But all the N:N relationship creations are not supported.
Could you please let us know is there any way to Create these Relationships using Azure Data Factory Please?