Microsoft 365 is compatible with PC, Mac, Android, and iOS. See system requirements for compatible versions of your devices, and for other feature requirements.

No. Microsoft 365’s applications are tailored for each platform and each operating system. The applications available for Mac users and the specific features included may be different from those available for PC users. With Microsoft 365, you can transfer your work across PC or Mac devices using you Microsoft account.

Internet access is required to install and activate all the latest releases of apps and services included in all Microsoft 365 subscription plans. Note that if you are an existing subscriber, you do not need to reinstall or purchase another subscription.

For Microsoft 365 plans, internet access is also needed to manage your subscription account, for example to install Office apps on other PCs or to change billing options. Internet access is also required to access documents stored on OneDrive, unless you install the OneDrive desktop app.

You should also connect to the internet regularly to keep your version of Microsoft 365 up to date and to benefit from automatic upgrades. If you do not connect to the internet at least every 31 days, your apps will go into reduced functionality mode, which means that you can view or print your documents but cannot edit the documents or create new ones. To reactivate your apps, simply reconnect to the internet.

You do not need to be connected to the internet to use the Office apps, such as Word, Excel, and PowerPoint, because the apps are fully installed on your computer.

If you have an active Microsoft 365 Family or Microsoft 365 Premium subscription, you can share it with up to five other people. Each person you share your subscription with can install Microsoft 365 on all their devices and sign in to five devices at the same time.

To add someone to your subscription, sign in to your Microsoft account and follow the on-screen instructions to add a user. Each person you add will receive an email with the steps they need to follow. Once they have accepted and completed the steps, their information, including the installs they are using, will appear on their My account page. You can stop sharing your subscription with someone or remove a device they are using by logging into your Microsoft account.

To use Copilot in Word, Excel, PowerPoint, OneNote, and Outlook, make sure you have the latest version of Microsoft 365 installed. If you're signed in, have the latest updates installed, and still don't see Copilot, please restart your Microsoft 365 apps. Learn more about why I am not seeing Copilot in my apps.

Your Microsoft 365 Personal, Family, or Premium subscription unlocks higher AI usage limits to experience and engage with Copilot in your Microsoft 365 apps, the Microsoft Copilot app, and beyond. Learn more about credits.