Currently in Microsoft Q&A we only support English, could you please edit your question into English? This action could help us understand your issue better, thanks for your understanding.
Based on the translation tool, I get the following content. Any misunderstanding please let me know.
What's the plan of your Office 365 Education? Did you assign licenses of Office 365 A1 Plus for students for them?
Please note, Office 365 A1 for students does not contain the desktop versions of Office , it only includes the web versions.
If the licenses are Office 365 A1 Plus for students, and you assigned a license to each guest user successfully, please refer to the article "Unlicensed Product and activation errors in Office" to troubleshoot activation issue.
You may also let guests install Office via their accounts. More detailed informaton, please refer to "Download and install or reinstall Microsoft 365 or Office 2019 on a PC or Mac".
If an Answer is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.