This hotfix applies to Microsoft SQL Server 2012 Reporting Services (SSRS 2012) and SQL Server 2014 Reporting Services (SSRS 2014).
Consider the following scenario:
You configure Microsoft SQL Server 2012 Reporting Services (SSRS 2012) or SQL Server 2014 Reporting Services (SSRS 2014) to run in SharePoint Integrated mode.
You have a report together with parameters that have expression-based default values.
You create a subscription for the report.
A "Use Default" option is not displayed for the parameters on the subscription properties page.
In this scenario, the expressions for the default values are evaluated only one time. Additionally, older values are used instead of the expressions for the default values when the subscription is run again.
Each new cumulative update for SQL Server contains all the hotfixes and all the security fixes that were included with the previous cumulative update. Check out the latest cumulative updates for SQL Server:
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.