The logs of each migration are stored in the persistent storage of the Docker container. You can access those logs either through the migration result screen (available at any time) or by viewing the file on the perstistent storage.

If you use the default directory, migration related files a stored in /opt/aagm/migrations/<ID>. The ID can be retrieved from the URL on the migration details. The directory contains all created bundles, mappings and template files. If someting goes wrong during migration and you want to know exactly what happend, the directory contains everything you need to know.