Dear ithinkfiam,
Thank you for posting in Microsoft Community. We are happy to help you.
Based on the description, you want to sync the SharePoint folders to show it in File Explorer however there is no sync button. Before moving forward, we need more detailed information about the situation you are experiencing.
Kindly share with us the information below:
- May we know what permission do you have in the SharePoint folders?
- Are you the only one cannot see the sync button in SharePoint folder or others too?
- Could you please provide a screen shots to further investigate the concern.
Suggestions:
Kindly check with your SharePoint Admin if the Sync button is allowed to be shown in SharePoint and OneDrive.
- Go to SharePoint Admin Center.
- Settings
- OneDrive > Click on Sync.
Please note that the sync button might not appear right away and it will take time to be shown.
You can also check with the Site Owner to check your permission in the library.
- Go to the folder location > Click on Ellipses button > Manage access.
- Scroll down > Click on Advance
- Check Permissions > Type the UPN and click on Check Now.
- You can ask the site owner to grant you permission at least Edit.
We look forward to your response. Thanks for your cooperation. Stay safe and healthy always.
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Sincerely,
Zee | Microsoft Community Moderator