If you set this policy to 'Disable', make sure that you also set the 'NonRemovableProfileEnabled' (Configure whether a user always has a default profile automatically signed in with their work or school account) policy to disabled because 'NonRemovableProfileEnabled' disables the creation of an automatically signed in browser profile. To control the availability of sync, use the 'SyncDisabled' (Disable synchronization of data using Microsoft sync services) policy instead.
Specify whether a user can sign into Microsoft Edge with their account and use account-related services like sync and single sign on.