To view another person's profile:
On the sidebar menu, tap People.
Tap next to the person to view their profile.
Note: Alternatively, tap a person's name or picture wherever you see it, to open that person's profile.
To post to another person's wall:
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 open a One-on-One Conversation?