Below are the suggested steps on what to do if OneDrive is not syncing all folders and files on a shared network or drive:

1. Check Network Settings: Verify that the network settings enable OneDrive to sync content.
2. Close and Open OneDrive: Close OneDrive assigned by the administrator and then re-open it.
3. Allow Access to Other Devices: Ensure the respective settings have been enabled to allow access on other devices.
4. Update Firewall Settings: Check and modify firewall settings if necessary to enable OneDrive synchronization.
5. Check drive permissions: Ensure that the user has the right permissions to sync content.
6. Reinstall OneDrive: This may be necessary if none of the other steps mentioned above solve the issue.