Counting Duplicates in a Table with DAX

Hi, Syndicate_Admin 

Based on your description, I have created a measure to achieve the effect you are looking for. Following picture shows the effect of the display.

Measure:

Counts =

VAR _Counts =

    COUNTAX (

        FILTER ( ALL ( 'Table' ), 'Table'[ID] = SELECTEDVALUE ( 'Table'[ID] ) ),

        'Table'[ID]

    )

RETURN

    _Counts

If this does not work, could you please share some sample data without sensitive information and expected output.
How to provide sample data in the Power BI Forum - Microsoft Fabric Community

Best Regards,
Yang
Community Support Team

If there is any post helps, then please consider Accept it as the solution  to help the other members find it more quickly.
If I misunderstand your needs or you still have problems on it, please feel free to let us know. Thanks a lot!

How to get your questions answered quickly --  How to provide sample data in the Power BI Forum