iMac prompts for password saving Word documents to Desktop.

This is for my friend: She has a word document that was newly created on her new iMac Apple M4 (Tahoe 26.6.2) and everytime she tries to save any document to a Desktop folder, the password security window comes up even though she has read and write permissions on her iMac and also on the destination folder (which in some cases, some folders were imported from her old Macbook). How does she fix the settings so that she doesn't have to keep typing in her password each time she wants to save a document?