Hi @Patrick Laza ,
When we deployed the reports to the report server, we could manage the data source of the reports.
A report server uses credentials to connect to external data sources that provide content to reports or recipient information to a data-driven subscription.
You can specify credentials that use Windows Authentication, database authentication, no authentication, or custom authentication.
When you configure a report data source connection to use prompted credentials, each user who access the report must enter a user name and password to retrieve the data. (Suppose that you are using this.)
When you use the Windows Integrated Security option, the report server passes the security token of the user accessing the report to the server hosting the external data source. In this case, the user is not prompted to type a user name or password.
More details you may refer:
Regards,
Zoe
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