Hi @Martin Le Pere
Thank you for posting your question in the Microsoft Q&A forum.
Based on the information you have provided, looks like you want to migrate Excel links without breaking them.
Unfortunately, there is no available migration tool to migrate linked excel files without breaking them.
You can Publish a workbook to a SharePoint site in Excel for Windows - Microsoft Support. To ensure the links remain functional, consider using relative links or updating them manually after migration.
You can find more details at:
Tool to auto fix broken excel links after migration to SharePoint online | Microsoft Community Hub
Migrate Excel files with a lot of links to SharePoint Online? | Microsoft Community Hub
If you think this feature can be handy for you and colleagues, please provide your valuable ideas via Ideas · Community
Our dev team will listen and consider making it a feature in the future. Any ideas will be appreciated.
I hope this information helps.
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