Hi @FERNANDO JOSE BERBEGAL GARCIA ,
Based on your description, in my opinion you're looking for Track Changes feature in Word and Excel.
For Word, you can go to Review- Track Changes- Select Lock Tracking, then you need to enter the password to help you prevent from users turn off the Track Changes feature, please refer to this support to get more help:
For Excel, first go to File- Options- Customize Ribbon- select All Commands- add Track Change(Legacy) to New Group:
Any updates please let me know and I'm glad to help you. Hope the information is helpful.
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