There is nothing I could find in my Dexter literature that says they have any adjustments for aligning. Since this axle is relatively new, I'd call Dexter to get the answer to this. You don't want some highly qualified, well meaning alignment mechanic to attempt something that will ruin your suspension.
Wright and Penny
2010 Tundra 4X4 5.7L V8
2014 Rockwood 2604WS
Life is a cruel teacher. She gives the test first; the lesson then follows.