You may have noticed that the wrong value returned for attribute 'edsva-Lync-ConferencingPolicy' via the AR management shell using the Get-QADUser cmdlet.
This is a product defect (VSTS98573).
Use the AR MMC and/or the WI to read the 'edsva-Lync-ConferencingPolicy' attribute’s value.
This will be fixed on a future release of the product. Please refer to this article for updates or contact support referencing the Enhancement Request ID: VSTS98573.