Thanks for posting in the Qlik Community. Can you be more specific with your question?
What type of cube would you like to connect to?
We have custom connectors for Essbase, and you can use OLE DB to connect to MS SSAS. With MS SSAS you would need to issue the appropriate MDX statements to pull back the data. So please let us know and we can further help you.
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I am having a similar issue. I can connect through OLE DB - Microsoft OLE DB Provider for Analysis Services, but I can only see the data tables that exist, not any of the measures built in the model. Has anyone figured out how to see the measures from the SSAS model?