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.dat

About this tag
The .dat file extension is a generic data file format that can be created by various applications. On WindowsForum.com, users discuss issues where email attachments, particularly PDF files, are unexpectedly converted to .dat files by Microsoft Edge after a Windows 10 update. This problem typically occurs when sending emails via Outlook, causing recipients to receive unopenable .dat files instead of the original PDF. Troubleshooting focuses on preventing Edge from altering file attachments and ensuring default programs are correctly set.
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    Windows 10 Email - Edge Converting PDF to .dat

    Yesterday Microsoft downloaded Windows 10 anniversary update. Since then, when I email a pdf file, the recipient opens the file and it is converted by Edge to a .dat file - which can't be opened by the recipient. I sending mail by Outlook 10, HTML Format, and I check the properties of the PDF...
    • WEC
    • Thread
    • .dat acrobat anniversary edge email file conversion html issues outlook pdf support windows 10
    • Replies: 6
    • Forum: Windows Help and Support
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