Setting as Auto Save Location of Excel etc. on Macbook

I use a MacBook Pro and want to use Copilot on Microsoft Office, which requires the autosave settings.

I tried to set BOX as the autosave location, but it can't and shows the message "Disabled by Administrator" even though I could set the autosave location on another Windows PC.

Is this setting(function) restricted on Macbook? 

If there are any specialists, please teach me. 

Thank you,