You mean communication log between server/workstation?
Go to "C:\ProgramData\McAfee\Common Framework\DB\<machine_name>.log" or go to "System Tree", select one system, click on "Actions" button > "Agent" > "Show Agent Log".
It is a property within ePO. Any time you look at the table containing a machine, it is there. The solution is easy: Clear the Sequence error, Move the GUID and delete it or perform a force install from ePO to fix it.