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We are going to replace it with a new SCEM 2002 Server.
It's recommended that we could use a SCCM 2006, the life cycle of the SCCM 2002 will end at the October 1, 2021.
If we want consolidation migration environment, please refer to this similar case:
https://learn.microsoft.com/en-us/answers/questions/227872/sccm-consolidation-migration.html
Have a good day!
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