Taken from https://helpx.adobe.com/in/enterprise/kb/covid-19-edu-labs-faq.html#known-issues
Copy of file also uploaded below.
I see a trial prompt when I sign in to Acrobat DC on my computer.
When you install and launch Acrobat DC on a Windows computer and sign in, if you see a Try or Buy prompt, do the following:
- Exit Acrobat DC, if it is running.
- Download the AcrobatStudentAccess.zip file and extract it on your computer.
- Right-click the included EXE file and choose Run as Administrator. (Click yes or enter your computer password, if prompted)
- Start Acrobat DC. It should now launch without asking you to sign in.