If your company relies on OneDrive for data syncing, you should prevent users from syncing their personal files.
In this manner, youll block unauthorized data syncing.
As a result, the OneDrive for Business Sync Client will only support Office 365 accounts.
Consequently, users wont be able to sign in with their personal Microsoft accounts and sync personal OneDrive files.
For example, if theyre already doing that, theyll receive an alert that syncing has stopped.
The alert will pop up as soon as youve enabled the feature.
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Steps to Stop Users From Syncing Personal OneDrive Accounts
Locate and double-punch theDisablePersonalSynckey.
Its DWORD value should be1now.
Note: Depending on your current configuration, you may need to follow additional steps.
And this is how you could block the use of personal OneDrive accounts.