The 12.7 SP2 XPSSweeper output is not as expected versus the 12.52 SP1 release. Sweeper is not outputting the normal messages to the console. The Sweeper log does contain the expected messages.
Release: MSPSSO99000-12.8-Single Sign-On-for Business Users-MSP
In newer releases of XPSSweeper, the -vT option is required to output trace messages to the console.