Scheduling a Report

Hey Guys Sorry if this is not where I should be posing this question.

I have few reports that I am scheduling and I don't want to use (Credentials stored securely in the report server - Use as Windows credentials when connecting to data source) - I want to use Windows Integrated security and I am getting the error (Subscriptions cannot be created because the credentials used to run the report are not stored, or if a linked report, the link is no longer valid).

Is there a way around this for scheduling a report pointing to a Data Source.?

Thanks much.