Sharepoint Sync Onedrive - Long File Name issues

SharePoint Online allows very long paths (400 chars), OneDrive sync does not, it supports only 260 chars.

1. Use SharePoint’s built‑in “Export to Excel” 

This avoids PowerShell entirely.

1. Go to the SharePoint library.
2. Switch to List view (not Tiles).
3. Click Export > Export to Excel.
4. Open the file in Excel.
5. Insert a new column and use Code:

6. =LEN([@[Path]] & "/" & [@[Name]]), This shows the full path length, which is what OneDrive checks.

7. Sort by length.

Anything over 200 characters is a risk. Anything over 260 will break OneDrive.

2. You may use PowerShell with Graph. PnP sometimes fails because it does not return full paths for deeply nested items.