Lync
BIOISO
Skype For Business (Lync): Disable HTTP Fallback
Disable HTTP fallback in Skype for Business - prevents unencrypted HTTP communication (force HTTPS/TLS ONLY).
BIOISO
Skype For Business (Lync): Enable SIP Security Mode
Enable SIP security mode in Skype for Business - requires TLS for SIP protocol (encrypted signaling).