On June 06, 2022, Adobe discontinued support for Acrobat 2017 Classic and Acrobat Reader 2017 Classic. For more information, see End of support for Adobe Acrobat 2017 Classic and Acrobat Reader 2017 Classic.
Please purchase a new license: https://services.dartmouth.edu/TDClient/1806/Portal/Requests/ServiceDet?ID=44856