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The advantage of “Microsoft 365”, which allows you to use Office with a subscription contract, is that you can install Office apps on multiple devices .
In the conventional one-time purchase license, there was a limit of “up to 2 devices with the same OS”, but with Microsoft 365, you can log in to up to 5 devices at the same time.
Since you can use multiple devices, install Office on the device you usually use so that you can use it anytime.
In this article, we will introduce how to install Microsoft 365 on your computer or smartphone, and how to troubleshoot if the installation does not work.
How to install Microsoft 365 on PC (Windows/mac)
To install on your computer, sign in to Microsoft 365 and download the Office installer .
Sign in to Microsoft 365 to download
- Sign in to the Microsoft 365 portal (https://portal.office.com/).
- Click Install Office.
- Select the language of Office to install.
- Select your Office app version. (*)
- Click Install to download the Office installer to your computer.
*For Windows 10, it is 64bit.
If you don’t specify the 32bit version, the 64bit version will automatically download.
If you are installing on a device that is not connected to the Internet, select “Offline Installer” .
run the installer
- Run the downloaded Office installer on your computer.
- Follow the instructions on the screen.
- When the Office installation complete message appears, click “Close” to exit.
Activate
The first time you start any one of the Office apps, such as Excel or Word, you will be prompted for activation.
Follow the instructions on the screen to complete license authentication.
How to install Microsoft 365 on your smartphone (iPhone/Android)
If you use Microsoft 365 on your iPhone, iPad, or Android, search for the Office mobile app from the app store, download it, and install it .
The mobile app has
- Single applications such as “Excel” “Word” “PowerPoint” “Outlook” “OneDrive”
- “Microsoft Office” application that “Excel” “Word” “PowerPoint” became one
there is.
As a feature of the app store for smartphones, similar apps and fake apps may be hit, so be sure to check the app name and icon before installing.
Troubleshooting if installation fails
Troubleshooting when Office apps cannot be installed from Microsoft 365 or cannot be started after installation.
Product key not registered
If you purchased a Microsoft 365 license on an EC site such as Amazon, you need to link the product key to your account .
Sign in to the Microsoft 365 portal (https://portal.office.com/) and register your product key.
User has no license assigned
The Microsoft 365 license contracted by your organization may not have been assigned.
Ask your administrator to verify the license .
License assignment can be done from the Microsoft 365 admin center.
Note that it may take some time for the assigned license to be reflected.
If it is already allocated, please wait a while and try again.
Your subscription plan doesn’t support desktop apps
Plans like Microsoft 365 Business Basic and Office 365 E1 don’t include Office desktop apps .
If you are subscribed to one of these plans, you will not be able to install the app, so use the web version of the Office app.
Expired subscription
If your Microsoft 365 subscription has expired, you will not be able to perform a new installation .
Try to install after renewing your subscription.
network is slow
Since communication is being performed on the network while Office is being installed, the installation may not proceed if the network is delayed.
If the delay is severe, try switching the connection destination to a stable network such as a wired LAN .
Also, it is a good idea to close apps that are not in use.
low space
To install Office from Microsoft 365, you need about 4GB of free space on your computer’s hard disk .
If your hard disk is full, organize your data to free up space before installing Office.
Exceeded installation limit
Microsoft 365 enterprise plans allow up to 15 installations .
If there are more than 15, please uninstall one of them.
* There is no limit on the number of installations for Microsoft 365 Personal and Microsoft 365 Family.
The maximum number of devices that can be used simultaneously has been exceeded.
Microsoft 365 allows up to 5 simultaneous logins with the same account.
If you want to log in on the 6th device, please sign out from another device.
I get an error “Unlicensed product”
This error is displayed when Microsoft 365 activation has not been completed or has failed .
When you start the Office app and are asked to sign in, sign in with the account associated with the license.
How to deal with Office application problems
Let’s also check what to do if there is a problem with the operation of the Office application.
Update to latest version
App issues can often be resolved by updating to the latest version .
If you’re having trouble with an Office app, try updating the app with the steps below.
For PC
- Launch an Office app (such as Excel).
- Click File > Account.
- Click Update Options, then click Update Now.
Smartphone
- Open your app store.
- Check for pending updates.
- Run the update.
Office Repair
The PC version of Office has the ability to repair corrupted programs .
If your Office apps aren’t working properly, try repairing Office first.
- Open Control Panel.
- Click Programs and Features.
- Select Office and click Change.
- Select “Quick Repair” or “Online Repair”.
re-install
If repairing Office does not fix it, uninstall it and then reinstall it .
For uninstallation, it is better to use the dedicated removal tool provided by Microsoft.
- Download and run the removal tool from Microsoft’s support page.
- Select the version to uninstall and click Next.
- After the uninstall is complete, restart your computer and then reinstall.
Article Summary
We introduced how to download and install Microsoft 365 (PC / smartphone) and how to deal with problems.
In order to take advantage of multi-device support, please install and use it on various devices.