We apologize for the inconvenience caused, as per the description above, when you convert/export PDF file, you get an error message that you are not connected to the Internet, Is that correct?
Please try to convert the PDF to a different browser like Chrome, or Firefox, or Safari through the URL https://cloud.acrobat.com/exportpdf using your current Adobe ID and password and see if this makes any difference.
If you are using the free desktop version of Adobe Reader, then sign out and sign back in with your Adobe ID and password once in Adobe Reader, and check for any pending updates from Help>Check for updates.
Then try to convert the PDF into Word file.
If possible connect the machine to a different network environment like a guest wired/wireless network or mobile hotspot.
You may try the following KB doc for the internet connectivity issue: Resolve connection errors with Adobe Creative Cloud and Creative Suite applications
Let us know how it goes.
The first link gave me a "critical error". Unable to fetch base_ uris from files tier
I have a yearly subscription to Adobe Export PDF, Annual
Please connect the computer to a different network environment like a guest network or a mobile hotspot as few of our users were facing the same issue due to network/firewall restriction which was blocking our network and by changing the connection, the issue was resolved.
You may try to access the service through the URL https://cloud.acrobat.com/exportpdf on a mobile device for a testing purpose.
Is it your personal computer or an office computer?
Let us know your findings.
Ok, it worked with a different internet connection.
Do you know how I can check my firewall settings?
It is a work computer but we have no IT!
If it's an office computer, and you are connected to a Managed network which has restrictions, only IT personnel can check/modify the network settings.
There isn't much we can suggest you to modifying your office network settings by yourself. You have to take help of an IT person.
I have sent you a private message with the list of Adobe ports and URLs which need to be whitelisted on your office network and firewall settings. Please check your email inbox.
Could you send me the url's that need to be whitelisted so that I can pass them on to my IT team. I am having the same problem but don't have an option of another network.
I have shared the details of Adobe Ports and URLs on private message, please check your email inbox.