Hello,
I am glad to tell you that I could finally make it work. One the girls suggested the way and it´s Power Automate.
Do you know how that works? I had someone doing but I can tell you it takes a little of programming (I think Chat GPT might give you the info). it but I can give you the first steps here.
You go to office.com and enter in your account
2- Go to the 9 dots on the top left and select Power Automate, then select My Flows.
3- In my case, we created 3 flows. There is one for weekdays, Fridays, and weekends. And there is another for single days. We want to change them, so you have to go to the top and click edit on the pencil.
4- Setup automatic replies there are several parts: start time and end time. We can change the start time to the hour after the end of the instruction, and the same for the end time.
5- There is an internal message and an external message. Once you make the changes, you have to click save.
I hope this helps.