A family of Microsoft word processing software products for creating web, email, and print documents.
Currently, there isn't an option to set iCloud Drive as the default or preferred save location in Microsoft 365 apps on iOS. Files are saved to Microsoft-supported locations such as OneDrive by default. If you'd like to save a file to iCloud Drive, you'll need to use Save a Copy and then select your iCloud Drive folder manually. At this time, there is no setting to make iCloud Drive the default save location.