It's typical for Microsofties to use IE, search on Bing, etc. simply for dogfooding purposes, but it's not a specific requirement. It does draw some raised eye

It's typical for Microsofties to use IE, search on Bing, etc. simply for dogfooding purposes, but it's not a specific requirement. It does draw some raised eyebrows if you show up at the office with, say, a personal laptop that's a MacBook and a paired iPhone, but it's at the level of good-natured ribbing rather than actual managerial disapproval or job problems. I would usually say "Yes, but I convinced a family member to buy an XBox 360, so my corporate loyalty karma evens out!"