Micro-fucking-soft. If I could find the two people who have the keys then Redmond would be a smoking, glow in the dark crater by now.
At work we use Skype. We use skype for communicating with customers as well. It's not perfect, but in general it does what's needed in an easy to use manner. As long as there's a phone or internet connection I can use skype on whatever device I have with me.
But one customer insists that we use Microsoft "Lync. If you've never had to install it, I can't begin to describe to you what a great big pile of shit it is. The slurry tank on the farm, feed by 200 cows, contains less liquid shit than one single Lync client installation.
Once I had got through the installation and all of the configuration options it then required me to reboot my machine (for a messaging client installation?) and guess what? Oh, because I've just installed Lync, my machine now needs to install 35, yes thirty fucking five, new updates. With a reboot afterwards. Several hours wasted on unproductive crap.
And, and, and, and and, I'm one of the lucky ones because I don't have ms office on my machine. If I did, there are then all sorts of version incompatibilities to deal with.
This is just for the "basic" version, no doubt the "enterprise" version is even more of a bastard.
And (sorry, bad grammar again I know) do you know what? For days at a time the client hasn't been able to log into the server and even when it has the client has never used it to communicate with us.