Backup a service application using PowerShell
If you are making changes to a service application and need to take a backup beforehand this can be done quickly using the Backup-SPFarm cmdlet. Here is an example of how to backup the Managed Metadata service application and proxy:
Backup-SPFarm -Directory “\\WW-SP\Backups\Service_Applications” -BackupMethod Full -Item “Farm\Shared Services\Shared Services Applications\Managed Metadata Service” -Verbose
Backup-SPFarm -Directory “\\WW-SP\Backups\Service_Applications” -BackupMethod Full -Item “Farm\Shared Services\Shared Services Proxies\Managed Metadata Service” -Verbose
Note: Using “Backup-SPFarm -ShowTree” will display the list of items you can backup in the farm
To restore the service application use the Restore-SPFarm cmdlet.