Your installation of Microsoft product (Windows or Office) needs to check in with NCCU's license server at least once every 180 days.
→ Something went wrong when installing Office, what can I do?
→ How to delete Office from my PC completely ?
01.Please make sure there's no Microsoft Office in your PC before installing.
02.You can use this tool to delete Office. Or delete it from Control Panel.
Microsoft's Campus-Authorized Softwares (Windows and Office) need to activate once every 180 days.