LogFilter agentName is missing from lists and dashboards.
Admin Console | Administration | Setup & Support | Blackout Configuration | Create Blackout | Suspend Alarms or Data Collection | choose Target type = Advanced (all types) | expand Agents | my LogFilter Agents do not appear on this list.
Agents will not appear in lists or dashboards unless a topology object has been created for them. A topology object will not get created unless at least one "collection" has come in for that agent.
In this case, a LogFilter agent does not collect until at least one match string has occured.
If you would like your missing LogFilter agents to appear on the list where blackouts are configured per agent, force at least one match hit to occur for that LogFilter agent by writting the match string to its log (make sure alarm has occured which will tell you that the collection came in).