After finalising details on his move, he will now rejoin his international team-mates as they prepare for a World Cup qualifier against the Faroe Islands on Saturday.
He is Wolves' ninth signing of the summer following the arrival of Segundo Castillo, Nenad Milijas, Marcus Hahnemann, Kevin Doyle, Andrew Surman, Greg Halford, Ronald Zubar and the loan of Chelsea's Michael Mancienne.
Moxey expects that Maierhofer will complete Mick McCarthy's spending until January, although defenders Neill Collins and Darren Ward are likely to depart.
"There are still 24 hours remaining until the transfer window closes, and it may well be that there is more activity in the outgoing department," said Moxey.
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