It means your admin has blocked the sync of certain file types. You may see this icon if you sign in to OneDrive with a work or school account. Select the icon to see the warning message displayed in the activity center. If you see a yellow warning triangle over your OneDrive or OneDrive for work or school icon, it means your account needs attention. Learn more about what to do when your OneDrive account is frozen. If you see a red 'no entry' style icon over your OneDrive icon, it means your account is blocked. If you're seeing the sync pending icon in File Explorer, read OneDrive is stuck on 'Sync pending'. To help resolve these problems, read OneDrive is stuck on “Processing changes'. If OneDrive shows “Processing changes' for a long time, it could be because you have an online file open, a very large file syncing, a lot of files stuck in a queue. OneDrive will also check for other file or folder changes and may show 'Processing changes'. The circular arrows over the OneDrive or OneDrive for work or school notification icons signify that sync is in progress. This includes when you are uploading files, or OneDrive is syncing new files from the cloud to your PC. Learn more about How to Pause and Resume sync in OneDrive. To resume syncing, select the relevant OneDrive icon in the notification or menu bar area, select More and then Resume syncing.

The paused symbol over the OneDrive or OneDrive for work or school icon means your files are not currently syncing.

Note: If you see the error message 'You're already syncing a personal OneDrive on this computer', follow the steps to unlink and relink your account.

Where is settings icon in onedrive