Found this, it may help...
There is a separate Enable Copilotcheckbox in each app and the checkbox only applies to that app on that device. For example, if you want to turn off Copilot in Word and PowerPoint, you need to go to both apps and clear the Enable Copilot checkbox. If you have multiple devices, you need to go to each device and clear the Enable Copilot checkbox for each app. Also, turning off Copilot on a device turns off Copilot for anybody using that device.
As of January 16, 2025, the Enable Copilot checkbox is available in the following apps:
- On Windows: Version 2412 of Word
- On Mac: Version 16.93 of PowerPoint and Word
If you don't see the Enable Copilot checkbox in the app, check which version of the app that you have. If necessary, update your versionof the app on your device.
We're working on adding the Enable Copilot checkbox to Excel, OneNote, and PowerPoint on Windows devices and to Excel on Mac devices. That is tentatively scheduled to happen in February 2025. In the meantime, you can change your privacy settings to turn off Copilot.