The domain DNS name "%1" has an invalid format. DNS names can contain letters, numbers, and hyphens, but not spaces. Periods ...

The domain DNS name "%1" has an invalid format.

DNS names can contain letters, numbers, and hyphens, but not spaces. Periods are used to separate domain labels, which can be no longer than %2!d! bytes. The top-level domain name must contain at least one non-numeric character.

Characters that are not allowed include: ! " # $ %  ( ) * + , ' / : ; < = > ? @ [ \ ] ^ ` { | } ~

Example: domain-1.microsoft.com.