I use Office 365. Probably no surprise for many, but I like the world wide access and simplicity. However, since leaving Microsoft I found having to Skype people a little frustrating if I wanted to host a multi-party conference call, especially if some people need to dial in using a phone, rather than Lync from a PC. To this end I ended up purchasing a certified solution from PGi. PGi charge me per minute per person and I have dial in and out capability, so I can dial people to join the call and people can dial in with numbers for most countries around the world. Perfect, just like the solution I had when I worked at Microsoft. Except it didn’t work. People could dial the conference number and hear each other and others could be connected via VoIP, but the two groups could not hear each other. Not the solution I wanted. I ran the DNS tests that Microsoft asks for and did test calls with the nice people from PGi, but nothing was showing up as the error. Searching the internet...