Steps for downgrade Domain and Forest functional levels

1.Currently im running with 2012 forest and domain functional levels

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2.Using set=ADForestMode -ForestMode Windows2008R2Forest  PowerShell command we can downgrade the forest functional level

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3.Now we can see from GUI, its downgraded.

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4.Using Set-ADDomainMode -DomainMode windows2008R2Domain PowerShell we cn downgrade the domain functional level also

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*I have tested this in environment where there are no ad dependent application such as Exchange or SharePoint.

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