I installed the SolarWinds App and Network monitor. Ran the discovery, etc. and created 2 Exchange monitors [2007, one for Edge Trans and the other for Mailbox, etcx]. I saw all the available services being monitored, and it worked well. I noticed that the Node didn't have SNMP setup, so I tried to change the setting, but it didn't work. So I deleted the Node and re-added. Now the App monitor states that that "Due to licensing constraints, the APM monitor is not actively retaining data from this monitor".
Did I remove it incorrectly? Do I need to create a new database?