One day last week, when NO changes had been made to the Nagios system for a couple weeks, the source name for alerts changed from 'Nagios XI' to 'Newlon, Phil'. The nagiosadmin user is 'Nagios Administrator'. I have a user name philnewlon but the text name is 'Philip Newlon'. I thought that the system used the 'admin -> email settings' config? Now that the system suddenly wants to call me 'Newlon, Phil' that is a problem. Help desk people have written outlook rules based on 'Nagios XI' and I am catching heat for the change.
Sorry to 'blame' Nagios. I went to our mail admin and he had made a change in Exchange that caused this. There's an hour of my time I will never get back