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For information on the system requirements for enabling the add-in version of the desktop Word app, please refer to “ LegalOn System Requirements.”
Important Notes
LegalOn Contract AI (Japan) can be used if the following versions (builds) and packages are met.
*If these conditions are not met, you will not be able to add the add-in to the Word app.
◇Microsoft Office Version
For Windows: Version 2311 (Build 17029.20068) or later
For macOS: Version 16.79 (23111019) or later
◇Microsoft Office Package
Microsoft 365 (latest version)
Boxed version: Office 2024 / Office 2021 (latest version)
Volume License Edition: Office LTSC 2024 (latest version)
In the desktop version of the Word app, there are restrictions on the display of underlines and pop-ups in the main text, depending on the product. For details, see “[Add-in Version] Proofreading Contracts – Terms of Use.”
Add the Word Add-in
1. Log in to your Microsoft Account
Launch Word, click [Sign In] in the upper-right corner, and sign in to your organization’s Microsoft account.
If the user icon is displayed in the upper-right corner, you are already signed in; proceed to the steps in “2. Add the Add-in.”
2. Add the add-in
2-1. Add from LegalOn
On any contract details screen, click [Install Desktop Word Add-in] to launch the desktop version of Word.
If the LegalOn icon is displayed on the ribbon in the [Home] tab, the add-in has been successfully added.
Note
Even if you have already installed the add-in, the [Install Desktop Word Add-in] button will still display on the contract details screen and the home screen.
You can also install the add-in from the [Install Desktop Word Add-in] shortcut on the [ Home ] tab.
2-2. Add from the Office Store
① Open the [Home] tab
② Click [Add-ins] → [More Add-ins]
③ Search for the “LegalOn Contract AI (Japan)” add-in (it may be listed as “LegalOn (Japan)”) from the search bar at the top of the screen, then click [Add].
Note
When adding an add-in, be sure to select the Japanese version, “LegalOn Contract AI (Japan)” (or “LegalOn (Japan)”).
Please note that if you add the U.S. version (“LegalOn”), you will not be able to log in correctly.
*The Japanese version is the add-in with a description written in Japanese.
2-3. Adding an add-in centrally deployed by an administrator
When your system administrator centrally deploys the add-in, all users in the Tenants can use it.
For details, see “ How to Add a Word Add-in via a Microsoft 365 System Administrator.”
If “LegalOn Contract AI (Japan)” (or “LegalOn (Japan)”) does not display, the System Administrator may not have completed the centralized deployment of the add-in.
*Please note that there may be a delay of a few minutes after centralized deployment before the changes are applied.
Once the add-in loads successfully, the “LegalOn Contract AI (Japan)” (or “LegalOn (Japan)”) icon will be displayed on the [Home] tab.
Troubleshooting
Additional Information
If “Add-ins” does not display on the [Home] tab, open the [File] tab and click [Get Add-ins].
Login to the Add-ins version
① Click the “LegalOn Contract AI (Japan)” (or “LegalOn (Japan)”) icon displayed on the [Home] tab
② If the login screen displays, enter your email address and password, then log in
If you are already logged in to the browser version, the login process for the add-in version will be skipped.
Once you’ve completed the Login, the add-in version’s features are enabled.
Note
As shown below, the steps for logging in to the add-in version differ depending on the login method you use in the browser version.
If using an email address and password: Enter your email address and password to log in
For SSO: Enter your email address and log in by following the steps starting with “2.” in “Set up SSO – Test Whether You Can Log In with SSO ”
For Multi-Factor Authentication: Enter your email address and password, then follow the steps starting with “2.” in “Login using Multi-Factor Authentication – Register with an authentication app to log in ” to log in
If you change your password in the browser version, you will be automatically Logout when you launch (or Reload) the add-on version. If the login screen appears, please log in again using your new password.







