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I am trying to add a password to a pdf document. I go to "Tools"..."Security"... and that's as far as I can go.
Go to File - Properties - Security and select "Password Security" under "Security Method". Select your settings, enter your password, and you're done.
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Go to File - Properties - Security and select "Password Security" under "Security Method". Select your settings, enter your password, and you're done.
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This method is not working for me. Neither is the previously successful way of password protecting a PDF doc that I've created myself. At the point where I either Save the doc or Exit & Save - the program renames the file using a number & character hash and tells me it cannot be saved to the folder I've placed it in. This behaviour began after a recent Windows 10 update and persists regardless of logout / login to my PC as well as my Adobe Pro account.
I'm stumped. Also more than mildly annoyed.
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Does you use a third-party plugin?
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How does you add a password? What version of Adobe Acrobat does you use?
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>... the program renames the file using a number & character hash ...
I have never seen this.
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One possibility is that you installed some security software that is blocking it. Especially ransomware protection.