What does it mean when the “Stop sync” button is greyed out?
- The engine account is paused.
- The sync is applying updates.
- The sync is complete.
- The engine type is “Other.
The Stop sync button will be grayed out, and you won’t be able to stop a sync, when Sync has already started to apply updates to Search Ads 360.
Read more here: https://support.google.com/searchads/answer/3167221