Upgrading to Windows Server 2012 R2
For details, including important caveats and limitations on upgrade, license conversion between editions of Windows Server 2012 R2, and conversion of evaluation editions to retail, see Upgrade Options for Windows Server 2012 R2.
Quick reference table of supported upgrade paths from older Windows Server retail editions to Windows Server 2012 R2 retail editions:
| If you are running: | You can upgrade to these editions: |
| Windows Server 2008 R2 Datacenter with SP1 | Windows Server 2012 R2 Datacenter |
| Windows Server 2008 R2 Enterprise with SP1 | Windows Server 2012 R2 Standard or Windows Server 2012 R2 Datacenter |
| Windows Server 2008 R2 Standard with SP1 | Windows Server 2012 R2 Standard or Windows Server 2012 R2 Datacenter |
| Windows Web Server 2008 R2 with SP1 | Windows Server 2012 R2 Standard |
| Windows Server 2012 Datacenter | Windows Server 2012 R2 Datacenter |
| Windows Server 2012 Standard | Windows Server 2012 R2 Standard or Windows Server 2012 R2 Datacenter |
| Hyper-V Server 2012 | Hyper-V Server 2012 R2 |
License conversion
You can convert Windows Server 2012 Standard (retail) to Windows Server 2012 Datacenter (retail).
You can convert Windows Server 2012 Essentials (retail) to Windows Server 2012 Standard (retail).
You can convert the evaluation version of Windows Server 2012 Standard to either Windows Server 2012 Standard (retail) or Datacenter (retail).
Upgrading to Windows Server 2012
For details, including important caveats and limitations on upgrade, and conversion of evaluation editions to retail, seeEvaluation Versions and Upgrade Options for Windows Server 2012.
Quick reference table of supported upgrade paths from older Windows Server retail editions to Windows Server 2012 retail editions:
| If you are running: | You can upgrade to these editions: |
| Windows Server 2008 Standard with SP2 or Windows Server 2008 Enterprise with SP2 | Windows Server 2012 Standard, Windows Server 2012 Datacenter |
| Windows Server 2008 Datacenter with SP2 | Windows Server 2012 Datacenter |
| Windows Web Server 2008 | Windows Server 2012 Standard |
| Windows Server 2008 R2 Standard with SP1 or Windows Server 2008 R2 Enterprise with SP1 | Windows Server 2012 Standard, Windows Server 2012 Datacenter |
| Windows Server 2008 R2 Datacenter with SP1 | Windows Server 2012 Datacenter |
| Windows Web Server 2008 R2 | Windows Server 2012 Standard |
License conversion
You can convert Windows Server 2012 Standard (retail) to Windows Server 2012 Datacenter (retail).
You can convert Windows Server 2012 Essentials (retail) to Windows Server 2012 Standard (retail).
You can convert the evaluation version of Windows Server 2012 Standard to either Windows Server 2012 Standard (retail) or Datacenter (retail).
Upgrading to Windows Server 2008 R2
For details, including important caveats and limitations, see Windows Server 2008 R2 Upgrade Paths.
Quick reference table of supported upgrade paths from older Windows Server retail editions to Windows Server 2008 R2 retail editions:
| From Windows Server 2003 (SP2, R2) | Upgrade to Windows Server 2008 R2 |
| Datacenter | Datacenter |
| Enterprise | Enterprise, Datacenter |
| Standard | Standard, Enterprise |
| From Windows Server 2008 (RTM-SP1, SP2) | Upgrade to Windows Server 2008 R2 |
| Datacenter | Datacenter |
| Datacenter Core | Datacenter Core |
| Enterprise | Enterprise, Datacenter |
| Enterprise Core | Enterprise Core, Datacenter Core |
| Foundation (SP2 only) | Standard |
| Standard | Standard, Enterprise |
| Standard Core | Standard Core, Enterprise Core |
| Web | Standard, Web |
| Web Core | Standard Core, Web Core |
| From Windows Server 2008 (RC, IDS, RTM) | Upgrade to Windows Server 2008 R2 |
| Datacenter | Datacenter |
| Datacenter Core | Datacenter Core |
| Enterprise | Enterprise, Datacenter |
| Enterprise Core | Enterprise Core, Datacenter Core |
| Foundation | Standard, Foundation |
| Standard | Standard, Enterprise |
| Standard Core | Standard Core, Enterprise Core |
| Web | Standard, Web |
| Web Core | Standard Core, Web Core |
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