You can run an in-place upgrade to upgrade to System Center Configuration Manager from a site and hierarchy that runs System Center 2012 Configuration Manager.
Before upgrading from System Center 2012 Configuration Manager, you must prepare sites which requires you to remove specific configurations that can prevent a successful upgrade, and then follow the upgrade sequence when more than a single site is involved.
Upgrade to version 1802
When you have version 1802 baseline media, you can upgrade the following to a fully licensed version of System Center Configuration Manager version 1802:
An evaluation install of System Center Configuration Manager version 1802
System Center 2012 Configuration Manager with Service Pack 1
System Center 2012 Configuration Manager with Service Pack 2
System Center 2012 R2 Configuration Manager
System Center 2012 R2 Configuration Manager with Service Pack 1Upgrade to version 1802
When you have version 1802 baseline media, you can upgrade the following to a fully licensed version of System Center Configuration Manager version 1802:
An evaluation install of System Center Configuration Manager version 1802
System Center 2012 Configuration Manager with Service Pack 1
System Center 2012 Configuration Manager with Service Pack 2
System Center 2012 R2 Configuration Manager
System Center 2012 R2 Configuration Manager with Service Pack 1
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