Our environment is running Lync 2013 with BToE 2.1.0 installed. We have a mixture of VVX 500 and 600 phones running 188.8.131.525. We've recently noticed that most users do not have a Conference (Confrnc) softkey available during a call, but some do. We narrowed it down to phones connected with BToE Active do not have the softkey, but if BToE is deactivated the option exists and functions correctly. If I have an active call and then start BToE, the button exists, but does not work.