Click the Windows Start menu, select Settings, select Devices. In the list of Bluetooth Devices you should see Surface Earbuds under the Audio section as well as LE Surface Earbuds under the Other devicessection. When in the Surface Audio app and turning on Office integration this should do the pairing for the LE Surface Earbuds. I am curious if you see that pairing or not?
If the pairing of LE Surface Earbuds is there then Office integration should be turned on and the app is not detecting that for some reason.
If the pairing of LE Surface Earbuds is not there, then I would remove the Earbuds using the following step and then try re-pairing them again.
To remove Surface Earbuds:
- Start the Surface Audio app.
- Under the Devices drop down (on the left) make sure that Surface Earbuds is selected.
- Select Remove Device under where is says Surface Earbuds at the top of the app.
- Windows will prompt you to remove the pairing with Earbuds which you want to do.
Follow steps 1 & 2 in this article to setup your Surface Earbuds: