File handler not recognized after following OneDrive File Handlers documentation

[chrisbim]

Description

Our application fails to register its OneDrive file handler despite implementing the steps outlined in the Microsoft documentation:

• OneDrive File Handlers:
  https://learn.microsoft.com/en-us/onedrive/developer/file-handlers/?view=odsp-graph-online
• Reset File Handler Cache:
  https://learn.microsoft.com/en-us/onedrive/developer/file-handlers/reset-cache?view=odsp-graph-online

I have waited over 48 hours after deployment and have invoked the cache-reset endpoint, but the file handler never appears in the OneDrive UI.

Expected Behavior

• The custom file handler option should appear in the OneDrive web UI context menu for supported file types.
• Selecting that option should launch the web app with the chosen file loaded.

Actual Behavior

• No custom file handler appears in the OneDrive context menu.
• The cache-reset endpoint returns HTTP 200 with no visible effect.
• No errors or relevant logs appear in the browser console or network trace when using OneDrive.

[xzh6902]

I have the same issue. Anyone can help?

[ducdv-lumin]

Has your issue been resolved? I have experience registering a FileHandler for my app and successfully displaying a custom menu in OneDrive/SharePoint. I think I could help if possible.