It is an interesting one. It's impossible to know from the CA where MSI creates the log file for the current session. Neither MSI nor WiX doesn't provide any API for that. However if one is using Wix# Managed UI then the location is always deterministic. Thus if you use Custom UI sequence VS template you will see the link label on the Setup exit dialog. This link points to the corresponding log file.
Though I am not sure why do you need to do anything for that at all. Both MSI native and Wix# ManagedUI are clearly reporting the success (or failure) of the installation.
Though I am not sure why do you need to do anything for that at all. Both MSI native and Wix# ManagedUI are clearly reporting the success (or failure) of the installation.