This topic describes the deprecated Reporting Services features. The features are still available in the release in which they are deprecated; however the features are scheduled to be removed in a future release of SQL Server. Don't use deprecated features in new applications.
Features Not Supported in the Next Version of SQL Server Reporting Services
The following Reporting Services features won't be supported in the next version of SQL Server. Don't use these features in new development work, and modify applications that currently use these features as soon as possible.
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Features Not Supported in Previous Versions of SQL Server Reporting Services
What's New in Reporting Services (SSRS)
Backward Compatibility | Reporting Services
Behavior Changes to SQL Server Reporting Services in SQL Server 2016
Discontinued Functionality to SQL Server Reporting Services in SQL Server 2016