You can render a report based on a report history snapshot by supplying the rs:Snapshot parameter and setting its value to a valid snapshot ID. The parameter value is in the format YYYY-MM-DDTHH:MM:SS, based on the International Organization for Standardization (ISO) 8601 standard.
If you omit this parameter, the report is rendered according to the report execution and cache management option settings of the report server. For more information about report execution, see Set Report Processing Properties.
The following example shows a URL that retrieves a report history snapshot: