How sign in works in Microsoft 365 (2024)

With Microsoft 365, you can install Office on all your devices and sign in to Office on five devices at the same time. This includes any combination of PCs, Macs, tablets, and phones.

Get help signing in to Office

How sign in works in Microsoft 365 (1)

Here's what you need to know

Here are some tips for using Microsoft 365 on multiple devices:

  • Each person who uses Office on a device must have an account that's associated with Microsoft 365. This can be the account that subscribes to Microsoft 365, or any accounts that share a Microsoft 365 Family subscription.

  • When you install Office on a device, you'll be prompted to sign in the first time you start an Office app.

  • Office remains activated as long as you're signed in. If you sign out, your account’s license is removed and the app is deactivated. You can view and print files, but not create or edit files.

    To activate Office after you've signed out, you can sign in again with the account that’s associated with your subscription.

  • If you have more than five devices, Office will sign you out of devices automatically to stay within your sign-in limit. To use Office on a device where you've been signed out, just sign back in.

Common questions

What happens if I sign out of Office?

If you sign out, your apps will be deactivated. You can view and print files, but not create or edit files, until you sign back in. To learn more, see What happens when you sign out of Office.

If I share Microsoft 365 Family, how does signing in work?

You can share your Microsoft 365 Family subscription with up to five other people. Each person will use their own Microsoft account to install Office on all their devices and be signed in to five at the same time.

Get help sharing your subscription

Can other people sign in to Office on my device?

If a person signs in to Office on your device without a subscription, they will be able to view and print files, but not create or edit files. If you have Microsoft 365 Family, you can share your subscription with five additional people. Each person can sign in to Office using their own Microsoft account on your device to create and edit their own files.

Get help sharing your subscription

With Microsoft 365, you can install and sign in to Office on 5 PCs or Macs, 5 tablets, and 5 phones.

Get help signing in to Office

Here's what you need to know

Here are some tips for using Microsoft 365 on multiple devices:

  • If you sign in to Windows using your work or school account, you'll be signed in to Office automatically. On Macs and mobile devices, sign in using your work or school account to activate Office.

  • Office remains activated as long as you're signed in. If you sign out, your apps will be deactivated. You can view and print files, but not create or edit files, until you sign back in.

  • Office will sign you out of devices automatically to stay within your sign-in limit. To use Office on a device where you've been signed out, just sign back in.

Common questions

I signed in. Should I stay signed in?

We recommend staying signed in to Office so that your apps remain activated.

What happens if I sign out of Office?

If you sign out, your apps will be deactivated. You can view and print files, but not create or edit files, until you sign back in.

As an expert in Microsoft 365 and Office applications, I've been deeply involved in understanding the intricacies of their functionalities, user management, and licensing structures. My expertise extends to the practical aspects of using Microsoft 365 across multiple devices, and I can provide a comprehensive overview of the concepts discussed in the provided article.

Key Concepts:

  1. Device Installation and Activation:

    • With Microsoft 365, users have the flexibility to install Office on a variety of devices, including PCs, Macs, tablets, and phones.
    • Users can sign in to Office on up to five devices simultaneously, allowing for a seamless experience across different platforms.
  2. User Account Association:

    • Each person using Office on a device must have an account associated with Microsoft 365.
    • This can be the account that subscribes to Microsoft 365 or any accounts linked to a Microsoft 365 Family subscription.
  3. Initial Sign-In:

    • When Office is installed on a device, users are prompted to sign in the first time they start an Office app.
    • Office remains activated as long as the user is signed in.
  4. Sign-Out and Deactivation:

    • If a user signs out, the account's license is removed, and the Office app is deactivated.
    • While signed out, users can view and print files but cannot create or edit files.
  5. Sign-In Limit:

    • If a user has more than five devices, Office will automatically sign them out of devices to stay within the sign-in limit.
    • Users can sign back in to continue using Office on a device.
  6. Sharing Microsoft 365 Family Subscription:

    • Microsoft 365 Family allows sharing with up to five other people.
    • Each person uses their Microsoft account to install Office on all their devices and can be signed in to five at the same time.
  7. Usage on Shared Devices:

    • If someone signs in to Office on a device without a subscription, they can view and print files but cannot create or edit files.
    • With Microsoft 365 Family, the subscription can be shared, allowing additional users to sign in on the same device and create/edit their files.
  8. Automatic Sign-In on Windows:

    • If users sign in to Windows using their work or school account, they are automatically signed in to Office.
    • On Macs and mobile devices, signing in using the work or school account activates Office.
  9. Recommendation to Stay Signed In:

    • It is recommended to stay signed in to keep Office apps activated for a seamless user experience.
  10. Consequences of Signing Out:

    • If a user signs out, apps are deactivated, limiting functionality until signing back in.

This overview should provide a solid understanding of the key concepts related to using Microsoft 365 on multiple devices, ensuring a smooth and efficient user experience.

How sign in works in Microsoft 365 (2024)
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