W-18763411: Edit help with new multi-apps feature

messages/logout.md

@@ -10,6 +10,8 @@ The process is similar if you specify --all, except that in the initial list of
 
 Be careful! If you log out of a scratch org without having access to its password, you can't access the scratch org again, either through the CLI or the Salesforce UI.
 
+Use the --client-app flag to log out of the link you previously created between an authenticated user and a connected app or external client app; you create these links with "org login web --client-app". Run "org display" to get the list of client app names.
+
 # examples
 
 - Interactively select the orgs to log out of:
@@ -42,7 +44,7 @@ All orgs includes Dev Hubs, sandboxes, DE orgs, and expired, deleted, and unknow
 
 # flags.client-app.summary
 
-Client app to log out of.
+Client app to log out of. 
 
 # logoutOrgCommandSuccess
 
@@ -54,11 +56,11 @@ Successfully logged out of "%s" client app for user %s.
 
 # error.noLinkedApps
 
-%s does not have any client app linked.
+%s doesn't have any linked client apps.
 
 # error.invalidClientApp
 
-%s does not have a client app named "%s" linked.
+%s doesn't have a linked client app named "%s".
 
 # noOrgsFound