Restoremailbox positional parameters

Positional parameters immediately follow the restoremailbox command and precede the optional parameters.

original-mailboxname
Use this parameter to specify the name of the mailbox to restore from. The mailbox name can be either the mailbox-alias, the mailbox-display name, or the mailbox globally unique identifier (GUID). The original-mailboxname parameter is required.

To specify more than one name, separate them by commas.

If any mailbox name contains commas or blank spaces, enclose the entire mailbox name in double quotation marks.