Policy
Turn off AutoSave by default in PowerPoint
This policy setting allows you to turn off AutoSave by default in PowerPoint. AutoSave automatically saves all changes a user makes to files that are stored in OneDrive, OneDrive for Business, or SharePoint Online. If you enable this policy setting, AutoSave is off by default in PowerPoint. But, the user can enable AutoSave for PowerPoint by going to File > Options > Save. Or, the user can enable AutoSave for a specific PowerPoint file by using the AutoSave toggle in the title bar. If you disable or don’t configure this policy setting, AutoSave is on by default, but the user can disable AutoSave by going to File > Options > Save or by using the AutoSave toggle. Note: This policy setting only applies to subscription versions of Office, such as Microsoft 365 Apps for enterprise.
d0db2b9a3cea L_autoSaveDefaultOffPowerPoint Registry
Copy registry mappings
HKCU\software\policies\microsoft\office\16.0\powerpoint\autosavebydefaultadminchoicePolicy notes
This policy setting allows you to turn off AutoSave by default in PowerPoint. AutoSave automatically saves all changes a user makes to files that are stored in OneDrive, OneDrive for Business, or SharePoint Online. If you enable this policy setting, AutoSave is off by default in PowerPoint. But, the user can enable AutoSave for PowerPoint by going to File > Options > Save. Or, the user can enable AutoSave for a specific PowerPoint file by using the AutoSave toggle in the title bar. If you disable or don’t configure this policy setting, AutoSave is on by default, but the user can disable AutoSave by going to File > Options > Save or by using the AutoSave toggle. Note: This policy setting only applies to subscription versions of Office, such as Microsoft 365 Apps for enterprise.