Pietersen was axed from the England side when, after having made a brilliant hundred against his native South Africa at Headingley, it was alleged he has sent derogatory text messages, some said to be about then Test captain Strauss, to Proteas players.
Strauss retired from cricket after England's series loss to South Africa but insisted his decision had nothing to do with the Pietersen controversy.
Pietersen had to undergo a period of "reintegration" before playing a major role in England's series win in India before Christmas although a knee injury that forced him out of the tour of New Zealand in March kept him on the sidelines until last week.
He is due to return to England service in Thursday's second and final Twenty20 international against New Zealand at The Oval.
While Strauss doesn't doubt Pietersen's talents he is in no doubt of the need of a settled dressing room, especially given the upheaval Australia have suffered lately, culminating in the sacking of coach Mickey Arthur just 16 days out from the Ashes.