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Fix Missing Sync Option for OneDrive Shared Folders
Question details
The user is unable to find or click the Sync button for a OneDrive folder that has been shared externally.
- Product
- Microsoft OneDrive
- Device & OS
- not provided
- Scenario
- Attempting to synchronize a OneDrive folder shared by a different Microsoft 365 organization to a local computer.
- Observed behavior
- Normal OneDrive synchronization works properly, but the Sync option is completely unavailable for a specific externally shared folder, affecting a single user.
Verify that you are signed into your OneDrive account using the exact email address to which the external folder invitation was sent.
Re-establish the Microsoft 365 Guest Account Relationship
Use this solution to reset a stale or incomplete guest account profile in the external organization's directory, which usually restores the Sync option.
The missing Sync option typically occurs when the guest user profile in the external organization's Microsoft 365 environment is corrupted or incomplete. Removing and properly re-adding your guest account resolves this synchronization barrier.
Contact the owner of the shared folder or their IT administrator. Ask them to completely remove your existing guest user account from their Microsoft 365 Azure Active Directory.
Once the old entry is deleted, request the external administrator to send a new guest invitation to your correct email address.
Open the invitation email you receive, click the link to accept it, and sign in carefully using the correct Microsoft account credentials.
Ask the folder owner to share the folder with you one more time. Open the shared folder link in your web browser; the Sync option should now be visible on the top menu bar.
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Frequently Asked Questions
Why does the Sync button disappear on some OneDrive folders but not others?
This usually happens with externally shared folders when the guest relationship in Microsoft 365 is incomplete or misconfigured. Folders owned by your internal organization will continue to sync normally.
Can I force sync a shared OneDrive folder without the Sync button?
No, the Sync button is required to initiate the connection between the external folder and your local OneDrive client. However, if available, you can use the 'Add shortcut to My files' option as an alternative to make the folder accessible locally.
Does this missing sync option affect all users invited to the folder?
Usually, this is an account-specific issue. The folder might sync perfectly fine for internal users or other external guests who have properly configured guest profiles in the hosting organization's directory.
