Outlook Template (Users can't modify data)

[Bootsy]

Hi All,
Been a while hope everyone is doing well!

Got a little issue here. I'm trying to create an outlook template for our marketing team to use. This template will just have boxes for them to fill out, but I cannot seem to find a way to lock the rest of it. The users cannot be able to edit anything other than the boxes they are meant to fill out.

Please let me know if you have any tips for me.

Thanks!