I just noticed that Windows 10 changed the default app for the .ost file type to Adobe Acrobat (with the red Adobe logo), and I can't figure out how t

[Jim D._001]

I just noticed that Windows 10 changed the default app for the .ost file type to Adobe Acrobat (with the red Adobe logo). See attached screenshot: I tried to change it to Outlook, but, in the settings page for default apps, Windows did not show that Outlook was a choice--and, worse, when I searched in the AppStore as suggested by Windows, Outlook did not show up as a choice. Instead, all choices for .ost apps in the AppStore looked like third-party PDF apps or third-party OST-management apps. Can you suggest a solution? /s/ Jim D.

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