Skype for Business and TLS

Hi,

I am hoping someone can help with this one.

We are removing the old cyphers from a customers inhouse Skype for Business 2015 implementation, but we have come across a problem. We used iiscrypto to remove the old cyphers on the edge, proxy and skype server and they seemed to work okay, but we then heard from the customer to say the phones aren't connecting in to the Skype Server.

The only way we have managed to resolve this is to roll back to use the old cyphers, can anyone help me to remove the old cyphers and keep the clients working?

Client - Skype for Business 2016 (16.0.5065.1000)

Server - Skype for Business 2015 (6.0.9319.548)

Any help appreciated.

alamb200