How Do I Activate My Microsoft Office? This question is haunting most of the office users. Well, activation in Microsoft Office is pretty easy process. Any novice user can easily do that. If you have an office 365 subscription, then you don’t need to activate your Microsoft Office program. You just sign in with your account and then you are good to go. In case you do not get the direct solution, then you know the process of How Do I Contact Microsoft Office Support? Many solutions are available to you, but you implement only deserving to come back in healthty result. So, first check whether you have a subscription or not. If you don’t have any subscription plan or you bought a retail version of Microsoft office, then you will need the 25 digit product key to activate your Microsoft office. With the help of this product key, you can activate MS office in any of the Office apps or by using the MS office website.