Topic Status: Some information in this topic is preview and subject to change in future releases. Preview information describes new features or changes to existing features in Microsoft SQL Server 2016 Community Technology Preview 2 (CTP2).
Returns the value of the CustomData connection string property if defined; otherwise, null.
The CustomData function can retrieve the CustomData connection string property and pass a configuration setting to be used by Multidimensional Expressions (MDX) functions and statements, such as UserName (MDX) and CALL Statement (MDX). For example, this function can be used in a dynamic security expression to select the allowed/denied set members for the string value in the CustomData connection string property.