So, you have informed to

badlop — Thu, 09 Feb 2017 16:29:16 +0000

So, you have informed to ejabberd how to connect to your MySQL database. Now you must tell to ejabberd what modules you want to use MySQL instead of Mnesia.

For that, many modules support the db_type option. Use it like this:

  mod_mam:
    default: always
    db_type: sql

ejabberd - Comments for "Ejabberd mysql connection"

So, you have informed to