I'm trying to follow along with this code sample from the Lync 2013 Client SDK documentation on MSDN (https://msdn.microsoft.com/EN-US/library/office/jj933060.aspx).
For some reason, I am never able to connect the ContentSharingModality in the Lync conversation - CanInvoke(ModalityAction.Connect) always returns false.
I am using an Office 365 Lync account, although I don't see a good reason why that should matter - if I use the same accounts logged into the Lync client normally, I can share the same content types with no problem, so I don't think it is a matter of permissions in Office 365.