I am not able to create subscriptions for SSRS reports as it gives the following 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cannot be created because the credentials used to run the report are not stored, or if a linked report, the link is no longer valid.
My set up is as following:
ServerA - Database Server
ServerB - Report Server
MachineC - Internet explorer to view the reports
So I am viewing reports on Machine C, IE, and ServerB connects to ServerA for Datasource.
The problem sounds like the report expects the user to provide credentials when it is viewed. When you create a subscription, it does not have the credentials to execute the report.
Go to the report, click the properties tab, then choose Data Sources in the left pane.
Are you using a shared data source? Is it using Windows integrated security? If so, can you change it to use a service account made just to run these reports? You may need to view these properties by viewing the data source itself.
If it is a custom data source is the option "Credentials supplied by the user running the report" selected? If so, can you change it to "Credentials stored securely in the report server"?
Either way, if you want to set up a subscription, I have made it work by providing credentials in the data source rather than have the user input them.
If you are worried about security, I would suggest managing that on the report level rather than the data source level.