Another nice function of DISM is for upgrading the OS version. You can use it to upgrade from standard to enterprise or datacenter via the command line without reinstallation. Super handy! See sample syntax below -
C:\Windows\system32>Dism /online /Set-Edition:ServerEnterprise /ProductKey:xxxxx-xxxxx-xxxxx-xxxxx-xxxxx
Deployment Image Servicing and Management tool
Image Version: 6.1.7600.16385
Starting to update components...
Starting to install product key...
Finished installing product key.
Removing package Microsoft-Windows-ServerStandardEdition~31bf3856ad364e35~amd64~~6.1.7601.17514
Finished updating components.
Starting to apply edition-specific settings...
Restart Windows to complete this operation.
Do you want to restart the computer now (Y/N)?
For those interested in reading up some more on DISM, here is the technet reference: