Hi chrisc19589743, Sorry to hear the inconvenience caused to you and thanks for sharing the detailed information. Protected Mode is a feature for Adobe Reader DC only. So, bProtectedMode will have not affect Adobe Acrobat DC. To debug the issue for Acrobat, can you please let me know the following: Does crash happen just after application launch or opening any PDF file ? Does crash happens only on launching the application on RDS server or does it also crash when directly launched on server 2016. If crash happens on opening any PDF file, does it crash for all the files? If crash happens on opening any PDF file, how exactly are the users opening the file ? (like double click or file->open or drag/drop) Thanks, Shakti
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