Need to screen share from Skype for Business to Lync 2010

Hi,

My company has upgraded us to Skype for Business but our biggest client, DHL are still using Lync 2010. When I try screen share with them I constantly get disconnected or the lag makes it practically unworkable.

I used to use Lync attendee but since Skype for Business was installed I am unable to join the Lync calls via anything but Skype for Business.

Please help as it is critical that I can share my screen with this client.

regards

Sharlz