If I have a 4.2 Universal Forwarder (Windows) installed on a machine that was migrated from 4.1.x and still has the old installation present but not active, what is the behavior of a second "migration" to 4.2.1, i.e. MIGRATESPLUNK=1?
Will it copy checkpoints from the 4.1.x install or just upgrade over the 4.2 install?
According to the documentation on upgrading a universal forwarder on Windows, the upgrade will ignore any commandline flags, such as MIGRATESPLUNK:
http://www.splunk.com/base/Documentation/latest/Deploy/UpgradetheWindowsuniversalforwarder