Hi @LEFRANCOIS Frederic OBS/DD
For data sources supported by SSRS, you can check this document: https://learn.microsoft.com/en-us/sql/reporting-services/report-data/data-sources-supported-by-reporting-services-ssrs?view=sql-server-ver16.
If you are going to use Dynamics Datasource, it may be more convenient to use SSDT. You can check this link: https://www.crmcrate.com/ssrs-report/build-a-ssrs-report-in-dynamics-crm-step-by-step-guide/.
Best regards,
Aniya