I am not sure if your question is related to the Denodo, note that this forum is for questions related to the Denodo Platform. If what you need is to have Denodo retrieving data from MS SSAS, you can do that by creating a Multidimensional DB data source in Virtual DataPort Administration Tool specifying the XMLA URI. For connecting to SASS you will have to define it as a Multidimensional DB data source.
For more details, you can follow this knowledge-based article.
Hope this answers your question!