Cannot open RPMSG file in Outlook - Microsoft Community
https://answers.microsoft.com/en-us/outlook_com/forum/all/cannot-open-rpmsg-file-in-outlook/6f3fe377-c85f-4852-9c1a-cf9dff7eb8b1
WEBFeb 29, 2024 · Opening the file from Outlook manually doesn't work, the user clicks the attachment i.e the RPMSG file, gets the "Only open these types of files from trusted sources" prompt, presses OK and then receives an error stating that this type of file cannot be opened with Outlook, like what in the hell???
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