Hello griffithgcd
Sorry for the delay in response to your query and apologize for the inconvenience caused. As per the description and details shared about the Volume license of Acrobat Pro 2017 has two order quantity. Each serial number for Windows and Mac can be used for activation.
Please download the setup of Acrobat Professional 2017 17.0 MLP AOO from Adobe's Licensing website https://licensing2.adobe.com with the email address on which the Adobe Order 142260556 is placed and registered. Download and install the setup. To know more about Licensing website refer to Adobe Licensing Website | Serial numbers, orders, and accounts Link: https://helpx.adobe.com/x-productkb/policy-pricing/volume-licensing-site.html
Before running the setup, please use Acrobat Cleaner tool remove previously installed Acrobat or any corrupt installation files Download Adobe Reader and Acrobat Cleaner Tool - Adobe Labs Link: https://labs.adobe.com/downloads/acrobatcleaner.html
Reboot the machine and then run the downloaded setup as an Admin. Use the serial key for activation.
If you still face any issue, please contact the Adobe support team https://helpx.adobe.com/in/contact.html
I have also sent you the direct contact details of Adobe support team via private message, please check your email inbox.
Feel free to update this discussion for any further assistance.
Regards,
Anand Sri.