Powershell Tip #70: Raise the forest and domain functional levels

Tip: You can raise the forest and domain functional levels:

Domain

Set-ADDomainMode -Identity contoso.com -DomainMode Windows2012R2Domain

1	Set-ADDomainMode -Identity contoso.com -DomainMode Windows2012R2Domain

Forest

Set-ADForestMode -Identity contoso.com -ForestMode Windows2012R2Forest

1	Set-ADForestMode -Identity contoso.com -ForestMode Windows2012R2Forest

Note: In some cases you need to target the PDC using the -Server parameter:

Set-ADDomainMode -Identity contoso.com -DomainMode Windows2012R2Domain -Server $((Get-ADDomain).PDCEmulator)

1	Set-ADDomainMode -Identity contoso.com -DomainMode Windows2012R2Domain -Server $((Get-ADDomain).PDCEmulator)