The former Scotland international has joined Norwich from League One rivals Colchester United, the team involved in the humiliating 7-1 defeat of the Canaries just over a week ago.
Bryan Gunn was sacked as Norwich boss on Friday after only two games of the season.
Lambert will be joined at Carrow Road by assistant boss Ian Culverhouse and football operations manager Gary Karsa.
The two clubs are yet to agree a compensation package over Lambert, who will watch Norwich’s game at Brentford on Tuesday before taking full charge against another of his former clubs, Wycombe, on Saturday.
Speaking after that opening day mauling, Lambert insisted he fully expects Norwich to deliver their great expectations for this season.
He said: ‘Norwich will still be one of the favourites – no doubt about it.
‘We might have given them a fright, but the squad and the fanbase up here should carry them a long way.’