Standard Creative Cloud subscriptions usually require an internet connection at least once every 30 days to validate the license.
Enter your product’s and the Request Code you generated in Step 1. Adobe Acrobat Pro Offline Activation
Install Acrobat without Internet and AdobeID - Adobe Community Adobe Acrobat Pro Offline Activation
Specifically for enterprise customers in secure environments, this allows for permanent offline use via special packages created in the Adobe Admin Console . 2. The Standard Offline Activation Workflow Adobe Acrobat Pro Offline Activation