Three steps back for the chazan?

Hi,

Normally, one concludes the amidah by taking three steps backward. A chazan does not do this after concluding the repetition of the amidah, though; the chazan's three steps backward at the end of the kaddish shalem [whole kaddish] count for him.

If the minyan switches chazanim before the kaddish shalem, then the chazan who recited the amidah should take three steps backward.

(Rivivot Ephraim 1:96)

Have a great day,
Mordechai