The MDA Android client can be configured using Java-style .properties files in the directory at.iteg.mda.com/config/ under whatever andoroid.os.Environment.getExternalStorageDirectory() returns, i.e. usually on the SD card.
The application reads all *.properies files in arbitrary order, with the latest occurrence of conflicting options winning over earlier occurrences.
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Up to version 1.0.5, the MDA client for Android had to be configured using *.properties on the memory card.
While these are still read in certain situations and can be useful for MDA distribution to a large number of devices, the main approach to MDA's configuration is a dedicated administration tool, the MDA Admin that comes with MDA resp. MDA.apk.