Kindly plan to perform this process ONLY during Non Operational hours. You can do this process in the same server that you have SDP MSP installed.
Step 1: Stop the application and Take a backup of the existing data in the application. Navigate to the below path in CMD as an administrator.
This backup will be stored under the default Backup folder in \ManageEngine\ServiceDeskPlus-MSP\ directory or in the path where if you have specified.
Step 2: Now copy this Full backup to the Desktop or somewhere handy.
Step 3: Navigate to the below path in CMD to change the database type to PGSQL and save.
Step 4 : Start the application service once for the new tables to get created in the database. Login and check Help->About to see if DB shows PGSQL.
Step 5: Stop the application service.
Step 6: Navigate to the below path in CMD to restore the database.
browse and select the latest backup taken.
Once the restore is complete you will get a pop up saying "Restore completed successfully", click Ok.
Step 7: Start the application service and check your data.
Step 8: License file can be obtained from the old server under \ManageEngine\ServiceDeskPlus-MSP\lib and the file name would be AdventNetLicense.xml. License can be applied through Help->License at the right top corner of the application.