The 27-year-old striker stormed out of the team hotel when told he would not be in the 18-man Canaries squad for Tuesday night's Capital One Cup clash with Rotherham United.
Grabban is the subject of two rejected bids from Bournemouth where he is determined to return after a successful two-year spell with the Cherries which yielded 35 goals in 93 appearances in all competitions.
Evidently, Norwich are keen to keep Grabban at Carrow Road and Neil has revealed that he will look to act after the player's transgression which saw him leave Rotherham to return home without the club's knowledge.
"I don't have any issues with any player. He might have an issue but I'll quickly fix it," Neil said after his side beat the Millers 2-1.
"There won't be any shedding of light. Any sort of thing that happens behind closed doors stays there and that has always been the case and that will remain the case.
"As far as I am concerned Lewis Grabban is a Norwich player, bottom line, that is it. Every player has got a price, but they have to meet a valuation we think the player is at, not what they think the player is valued at.
"We have rejected three bids from Bournemouth and the bids we have received were not anywhere near the valuation of our player.
"Until we get to a stage where the bids are acceptable then Lewis Grabban remains a Norwich player."