Hi,
Thanks for posting in Microsoft MECM Q&A forum.
We can try to use DISM command to add the default app association settings in Windows image file before we deploy it to the destination computers. For more detailed information, please refer to:
Export or Import Default Application Associations
Set default file association in windows 10 professional during OSD
Note: This is non-Microsoft link, just for your reference.
Thanks for your time.
Best regards,
Simon
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