Note: Outside users (people outside your company) have profiles, but they don't have walls. Outside users' names appear in purple text, and they have icons (
) after their names. If you want to post something to an outside user, you can do so through a one-on-one conversation. For more information, see How do I start a one-on-one Conversation with someone?
When you post on someone's wall, the post is visible to other users (unlike a one-on-one Conversation).
To post a message on someone's wall:
To learn how to control who can post to your wall, see How do I change my preferences?