Remarks: If a value that you supply contains spaces, use quotation marks around the text (for example, "OU=Domain Controllers,DC=microsoft,DC=com"). ...

Remarks:
If a value that you supply contains spaces, use quotation marks 
around the text (for example, "OU=Domain Controllers,DC=microsoft,DC=com").

If you enter multiple values, the values must be separated by spaces
(for example, a list of distinguished names).