BUG: Can't append further emails to Outlook portfolio pdf
Steps to reproduce: In Outlook, right-click on selected emails and choose "Append to Adobe PDF" to add further emails to an existing portfolio.
Environment: Acrobat Pro 2024 / Classic, Windows 11, Outlook 365.
Expected result: Additional emails are appended to an existing portfolio created using the Outlook PDFMaker add-in.
Observed result: The append process begins but is stalled by the error message "PDFMaker cannot append to the selected Adobe PDF archive because it was not created by Outlook PDFMaker". The process is then cancelled.
Additional information: As shown, I used Outlook's PDFMaker add-in to create the portfolio, and attempted to append emails to that portfolio from the same folder. Screenshots are attached of the process. One of the screenshots is of the document properties of the portfolio PDF I created for this report. The "Application" field in the "Description" tab of the document properties is blank. I believe this is what's causing the error. The same error was also present in Acrobat Pro 2020 (perpetual licence).