I have a shared dataset for a Mobile Report on SSRS 2016. The dataset sits on a SSAS data source, and has an MDX query to pull from the cube.

The primary key pulled back from the query is a date, and is formatted as such in SSAS; however when I use the dataset in Mobile Report Publisher it doesn't acknowledge it as a date datatype, it thinks it's a string. This means I can't use the dataset as a main series for a time chart, as it doesn't think there's anything formatted as a date.

The below is the section of MDX that I think is causing the issue.

```
SELECT
{
[Unresolved], [Assigned to Provider], [Unresolved past due date], [Other past due date], [Provider past due date], 
[Company past due date], [Provider PDD Daily Change], [Company PDD Daily Change], [Other PDD Daily Change], [Company pre due date], [Company PRDD Daily Change]
} ON COLUMNS,
NONEMPTY(
{
    [Date Snapshot].[Date].[Date]
}) ON ROWS
FROM [Source]
WHERE
( FILTER([Date Snapshot].[YQMD].[Date], [Date Snapshot].[YQMD].CURRENTMEMBER.MEMBER_KEY >= '2015-08-15') )

```