Syntax: Mtedit.exe /domain:value /DC:value /forest:value /DisableTrustChecking filename /? Parameters: /Domain:value Specifies ...

Syntax:
Mtedit.exe [/domain:value] [/DC:value] [/forest:value] [/DisableTrustChecking] [filename] [/?]

Parameters:

/Domain:value
Specifies the domains to be used with the  "Populate from GPO" option. You can specify multiple domains.

/DC:value
Specifies the domain controller to use for the previously specified domain. If no domain controller is specified, any will be used.

/Forest:value
If specified, the Migration Table Editor will use all domains in the specified forest to populate the Domain list in the Select GPO dialog box used for the "Populate from GPO" option. This parameter can be specified multiple times in order to include domains from more than one forest. The forest name must be specified as the DNS name of the forest root domain in the forest.

/DisableTrustChecking
If this parameter is not specified, you can only access domains to which you have two-way trust.

Filename
Specifies the name of a migration table you want to open in the Editor.

/?
Displays help with usage.