I would like to promote a KB article on the subject, which I published yesterday right after receiving a customer request in response to the recent DevExpress Logify: a New Exception Reporting Tool blog post.
The XAF article describes three typical ways to integrate Logify into an XAF app. Here I want to note that while the third option with a custom trace listener may look a bit complicated now, it is possible that the Logify team will come up with a built-in trace listener in the future (at least I talked about this with the responsible team and they also said that they thought about such an option). This way you will be able to plug-in this listener in an XAF app using a few lines in the configuration file or in code as per How to: Create and Initialize Trace Listeners (MSDN).
We would greatly appreciate it if you inform us of which XAF integration approach (# 1,2,3 or any other) you eventually implemented in your project and how it all worked for you. Thanks in advance!