I have a dataset (SSAS) in workspace A, and a report in workspace A that was also copied in workspace B.

People in my organization can see the report in workspace B after I grant them access at report (from workspace B) and dataset (from workspace A). But people in other organization cannot see the report and get this error message:

You cannot see the content of this report because you do not have permissions to the underlying dataset. Please contact the dataset owner to request access.

What should I do to grant access to other people to the report?

Should I copy the dataset from workspace A to workspace B? This dataset is pointing to SSAS cube (so it's a live connection) and I have remarked the dataset was not copied when the report was copied (as it usually happens).