After logging in, you'll be at the Agent View Dashboard. The Agent View Dashboard will display the number of message that need responses or actions taken. You can filter by campaign using the drop down menu. You only have access to the campaigns you're assigned to . If you do not see all off the campaigns in the dropdown list, it's because there have either been no replies, or you have already taken action on one of the responses. If you want to respond to messages from all campaigns your assigned to, back-to-back, leave the dropdown on "All Available Campaigns"