Acrobat preferences to convert Excel to PDF/A (limited PDF/A version list)
I have Acrobat 2017 Pro and want to convert Excel files to PDF/A. When I use the PDFMaker in Excel I can select PDF/A-1, PDF/A-2 or PDF/A-3 (a or b version) in Preferences, under 'PDF/A Compliance'. I want to convert multiple files at once, so I want to set Preferences in Acrobat to convert Excel to PDF, but I can only see PDF/A-1b, under 'Compliance Standard' (in the Standards panel, after clicking the Edit button next to the 'Adobe PDF Settings' list). Why aren't the other versions listed? Thanks in advance for your help.
