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DucDao's avatar
DucDao
Copper Contributor
Aug 05, 2025

Persistent OneDrive File Handler Cache After Removal

I’m a developer supporting an Azure AD application that was previously registered with a File Handler for PDF files (used to display the "Open with Lumin PDF" option in OneDrive’s context menu).

The File Handler configuration was removed on June 19, 2024. However, some of our customers are still seeing the "Open with Lumin PDF" option in their OneDrive UI. This is causing confusion and additional support overhead on our side.

I understand this is likely a caching issue, so I’ve asked our customers to:

  • Clear the server-side cache by following https://learn.microsoft.com/en-us/onedrive/developer/file-handlers/reset-cache?view=odsp-graph-online
  • Clear their browser cache, re sign-in in a new browser profile

I’ve already tried all possible solutions within my control to resolve this caching issue, but none have been effective. What else can I do to address this?

azure
Caching
File Handler
onedrive

1 Reply

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  • PeterH-LU's avatar
    PeterH-LU
    Copper Contributor
    Sep 02, 2025

    Please help fix this it makes Lumin look bad and we're one of the organisation suffering, it's been over two months now and we are still getting users suddenly gaining open with Lumin as a default despite the app being removed. 

    We've asked Microsoft if there's a big switch they can pull but so far struggling

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