You have installed the Microsoft evaluation software for Skype for Business Server 2019 from Microsoft Evaluation Center. During your deployment by using the evaluation software, the RTCSrv service can’t start. In addition, Event ID 12290 is logged in the event viewer, and you receive the following error message:
The evaluation period for Skype for Business Server 2019 has expired.
To resolve this issue, install the June 2019 update 7.0.2046.116 for Skype for Business Server 2019, Front End Server and Edge Server.