For Windows:  

1. Shut down ManageEngine AssetExplorer.
   
2. Take a backup of the application or snapshot of the server.
   
3. Open command prompt with admin privileges.
   
4. Go to [AE-Home]\bin directory and execute the command: stopDB.bat
   
5. Execute the command: changeDBPassword.bat -p <old password> -P <new password>. The following message is displayed:
6. Execute the following command to start the application services: startDB.bat   
   

For Linux:  

1. Shut down ManageEngine AssetExplorer.
   
2. Take a backup of the application or snapshot of the server.
   
3. Go to [AE-Home]/bin and execute the command: sh stopDB.sh 
   
4. Execute the following command: sh changeDBPassword.sh -p <old password> -P <new password>
   
5. Execute the following command to start the application services: sh startDB.sh