Offline visual studio's signed account has gone stale copy OnlineLicensing folder to offline computer's location C:UsersusernameAppDataLocalMicrosoftVSCommon

your licence has gone stale and must be updated

Copy from 

https://stackoverflow.com/questions/43390466/is-visual-studio-community-a-30-day-trial.

To bypass "30days left must go online to sign-in", sign-in once to Microsoft account, you'll get %LocalAppData%MicrosoftVSCommonOnlineLicensing folder that you can copy to offline PC's matched location,such as C:UsersusernameAppDataLocalMicrosoftVSCommon

【推广】 免费学中医，健康全家人
原文地址：https://www.cnblogs.com/Fred1987/p/15124645.html