1-First Login into your Microsoft Dynamics 365 CRM and then click on Settings.
2-Then in settings click Solutions options under customization.
3-Then solution package window will open where we need to click on Import option.
4-Then Select Solution Package Pop up window will open. Here we need to Browse for the DBMSQB3.0 Manged solution file.
5-Then after selecting the file click on next and it will start importing the package. Once the package is imported you can see the solution package installed as below image.
