Microsoft 365 Apps for business can be used on multiple PCs! How many devices can be used simultaneously?

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Due to the diversification of work styles, it has become commonplace for businesses to use multiple devices.

One of the challenges of using multiple devices for work is managing app licenses.

If you purchase a license for the number of units you use, the cost will increase, so it is advantageous to use a license that allows multiple units to be used simultaneously.

Office 2021 can be used simultaneously on up to 2 PCs

Permanent licenses such as Office 2021 can be installed on up to 2 computers, so you can use 2 computers at the same time.

However, it does not mean that you can install it on a computer used by another person.

Since the Office perpetual license is used by linking it to a Skype. However, very interesting alternatives have emerged to the well-known Microsoft account, it is necessary to log in with the same account when installing it on a computer.

The number of simultaneous use of Microsoft 365 Apps for business is 5

“Microsoft 365 Apps for business”, which can be said to be a subscription version of the Office license, is a plan that allows you to use the same apps as Office Professional 2021 with a monthly or annual contract.

The big difference from Office’s perpetual license is that Microsoft 365 Apps for business allows you to install apps on devices other than computers.

In addition to the variety of devices available, the number of concurrent users has also increased significantly.

  • Number of installations: up to 5 PCs, tablets, and smartphones each
  • Simultaneous use number: Up to 5 units in total
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There is no upper limit on the number of simultaneous uses for each device, as long as it is within the installation limit.

For this reason, you can use it in any combination, such as “1 PC, 2 tablets, 2 smartphones” and “5 PCs only”.

How to install Microsoft 365 Apps for business

In order to use Microsoft 365 Apps for business on multiple devices at the same time, first install the app on your device.

Installing the app requires a network environment and takes some time, so it is recommended that you complete the installation in advance.

If the installation is complete, you can start using it just by signing in, and when you want to change the device you use, just sign out and sign in again on another device, so it’s easy.

Procedure to install on PC

To install Microsoft 365 Apps for business on your computer, sign in to Microsoft 365 to get the installer.

Here, we will explain the procedure using Windows 10 as an example.

  1. Go to ( ) and sign in.
  2. Click the user icon in the upper right and click View Account.
  3. Click Install Office.
  4. Select your language and version and click Install.
  5. Run the downloaded installer on your computer.
  6. After the installation is complete, launch an Office app (Word, Excel, etc.).
  7. Enter your email address and password to activate the license, and you will be able to use Office apps.

How to install on your smartphone/tablet

For smartphones and tablets, there is a “Microsoft Office” app that includes Word, Excel, and PowerPoint.

There are also separate applications for Excel and Word, so let’s choose according to the purpose of use.

To install, search for the app name on the app store (App Store, Google Play) and install it, or download from Microsoft’s download site ( ) Get the download link.

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Frequently asked questions about multiple simultaneous use

This is a FAQ about using multiple devices simultaneously for Microsoft 365 Apps for business.

Can multiple people share one license?

Even if you say that you can use up to 5 devices at the same time, if you don’t have that many devices or you don’t use them at the same time, the number of devices you can use will be too much.

At this time, it would be convenient if you could lend the unused part to others or use one license for multiple people, but this is NG.

Simultaneous use of multiple Microsoft 365 devices is limited to “devices owned and used by the same user”.

Please note that you cannot install or sign in to your device for use by another user.

Can I give unused licenses to others?

With Microsoft 365, you can’t give only part of the number of users to another person, but you can change the whole license.

For example, a license can be removed from a retired employee or a user who no longer needs Microsoft 365 due to a change in work duties and assigned to another person, so the license owned by the organization can be effectively used according to the transfer of personnel. can.

What happens if I sign in to 6 or more devices?

Up to 5 devices can be used simultaneously for Microsoft 365.

So what happens when you try to sign in to the sixth machine?

According to the current Microsoft 365 specification, when you sign in on the 6th device, you will automatically be signed out from the old device, so there will be no such thing as a failed sign-in on the 6th device.

However, in the case of automatic sign-out, you will not be able to choose the device to sign out by yourself, so if you are signed out from an unintended device, please sign in again when you want to use it again.

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Article Summary

  • Microsoft 365 Apps for business can be used simultaneously on up to 5 computers, tablets, and smartphones
  • If you install Microsoft 365 on your device, you can change the device used for sign-in and sign-out
  • It is a license violation to use one license by multiple people
  • If you sign in beyond the concurrent usage limit, you will be automatically signed out from other devices

With Microsoft 365, which supports simultaneous use of multiple devices, you can use familiar Office software from any terminal.

Compared to the perpetual license of Office, the number of devices that can be used and the number of devices that can be used at the same time are increased, and you can access your data using cloud storage. It goes without saying that the possibilities are vast.