Here is the scripts to create managed metadata service application via PS. $newSPMetadataServiceApplicationSplat = @{ Name = "Managed Metadata Service Application" DatabaseName = "<DBName>" ApplicationPool = "<AppPoolName>" FullAccessAccount = "<AppPoolAccount>" DatabaseServer = "<DBServer>" } $MMSApp = New-SPMetadataServiceApplication @newSPMetadataServiceApplicationSplat New-SPMetadataServiceApplicationProxy -Name "Managed Metadata Service Application Proxy" -ServiceApplication $MMSApp -DefaultProxyGroup