Dons manager Derek McInnes is delighted Miles Storey is finally an Aberdeen player.
The 22-year-old. who spent last season on loan at Caley Thistle, joined from Swindon Town on Friday after the Robins refused to release the attacker from his contract early.
The English League One club were disappointed to lose Storey without receiving any compensation.
Their insistence on Storey seeing out his contract meant the forward was not registered in time for Thursday’s Europa League match against Luxembourgish side Fola Esch.
Storey will sit out Thursday’s second leg at the Stade Josy Barthel but McInnes hopes the Englishman will have European football to look forward to later this month if the Dons can complete the job after winning 3-1 in last week’s first leg.
The Aberdeen manager said: “It can’t have been easy for Miles as he would have been desperate to join up with his team-mates.
“He has been working away on his own an we will get him straight into some football work to integrate him with the squad.
“Hopefully we will get a performance in Luxembourg so he has another round of Europe to look forward to.
“We brought him to the team to add more of a goal threat and his influence could maybe have made things easier for us in games such as Thursday night’s.”
McInnes left last season’s leading-scorer Adam Rooney on the bench for Thursday’s win with new signing Jayden Stockley chosen to lead the line.
But the Aberdeen manager said Rooney, who came on and netted an added-time penalty, was not included from the start as a precaution.
He added: “He has been out with a tear in his thigh for five months and has only been back for three weeks.
“Although he has done most of the training Adam hasn’t quite managed to do all of it. He had 75 minutes against Brechin which wasn’t really played at a high tempo.
“We felt if he was only going to get part of a game, it would be better in the second half when the game was stretched.
“It was brilliant to get him on and for him to score a penalty.
“Without Miles Storey available or Adam being full pelt we had a decision to make as we did want to go with a front two.”