Perpetual License Prompting for Sign in with Adobe Acrobat 2015 DC

Last year, we deployed Adobe Acrobat DC with a perpetual license key with offline exemption. Within the last week, some users, less than 5%, have been prompted to log in when starting the application rendering it unusable. The current workaround is to uninstall then reinstall the software and we're looking for a better way. What is the best way to troubleshoot this issue?

Adobe Acrobat DC (2015) - 15.006.30456

Microsoft Windows 10 Enterprise - 10.0.17134 Build 17134