Sorry to hear about the trouble.
I assume you are working on Adobe Acrobat DC? However, you should download Adobe Acrobat Reader DC and signed in using the correct email address.
We have checked your account and found an active subscription of Adobe Export PDF.
Follow the steps mentioned below, to activate the subscription.
1- Export PDF is an online service that you can use online via: https://cloud.acrobat.com/exportpdf
2- You can also use the services through free desktop version of Adobe Acrobat Reader DC: Adobe Acrobat Reader DC Install for all versions
3- “Sign In” using the email (Adobe ID) under which you have subscription registered.
4- For detailed description of how to use the Export PDF service, you may refer to- Using Adobe Export PDF
You may refer to the following link for any troubleshooting: Troubleshooting Create PDF, Export PDF, Adobe Send, Fill & Sign … services(PDFPack or Document Cloud...
Let us know if it still doesn't work.
I can see that you're on the staff. I'm pretty desperate for an answer to the question I posed 3 days ago: Problem exporting a complex PDF as a Word Doc
Are you able to help - or even (I hope not) tell me that there is no solution to it so that I can look for a different approach?
Many thanks, Akanchha! I really appreciate it!