If you see the error message:
"Sorry, Office 365 has been configured to prevent individual acquisition of Office Add-ins"
when trying to install a LanguageTool add-in, it means that your organization (such as your university or workplace) has restricted installing Office add-ins that are not approved by them.
What can you do?
Please contact your Microsoft Office 365 account administrator or IT department for help. They can review the organization’s settings and, if appropriate, enable the installation of the add-in.
For more information, your administrator can visit Microsoft’s official support page,