In this Series of Posts related to SCCM 2007 to SCCM 2012 Migration , Let us first try and understand the Workflow that you need to follow for Migrating SCCM 2007 to SCCM 2012 .  Part # 2 of this Post can be found here :  https://sccmconfighelp.wordpress.com/2013/09/27/sccm-2007-to-sccm-2012-migration-step-by-step-guide-part-1/

Let us have a look at the below diagram :

SCCM 2007 to SCCM 2012 Migration Workflow

 

 

To start any Migration from SCCM 2007 to SCCM 2012 , the first step is to specify Source Hierarchy or the Source Primary Site from which the data needs to be migrated . Once you have specified the Source , you need to start the migration Job which will start data Gathering Process from the Source . By default , every 4 hours this job runs . After the data Gathering is complete , you Create Migration Jobs ( I will cover a separate Post for types of Data Migration ) .  After that you have migrated the data , you can stop gathering data from the source site . As an Optional Step , you can delete the Migration Historical data from the Destination Database .

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