Hello,
I can’t protect the whole document from being modify. In the documentation it says i would obtain this possibility here, but here is what i got :
Thank you for your help
Hi @Faucille 
The Protect Workbook option allows you to protect workbook structure and to control user’s workbook manipulations so that no one can view hidden worksheets, add, move, delete, hide and rename worksheets.
You can protect workbook with or without a password. If you don’t use a password, anyone can unprotect the workbook.
The Protect Sheet option allows you to protect the sheets and to control changes made by other users in a sheet as to prevent the unwanted changes to data and to restrict the editing abilities of other users. You can protect a sheet with or without a password. If you don’t use a password, anyone can unprotect the protected sheet.
Please let me know if this is not the information you were looking for 