This is very quick tip to make your Microsoft Dynamics NAV experience faster. Most probably when you open RTC you will get “The license information on the Microsoft Dynamics NAV Database Server is invalid.” error.
Withing simple steps you can solve this problem. You need to upload your Microsoft Dynamics NAV license first, Then you need to restart the service.
For upload license, Go to tools then License Information. Then Choose upload option and upload the license. After that you need to restart your Dynamics NAV service.
Finally you will solve the problem.