"I played it off the front foot so I'd get it a bit higher and land it softly and it was just the flawless strike".
Tanihara also escaped the first round bogey-free. Johnson, already a victor on the PGA Tour this year, had four birdies and four bogeys Thursday.
"It was nice to hole one on the last after two awful shots".
Campillo was one of three players - along with 11th-placed duo Branden Grace and Dustin Johnson - to sign for eight under on their second round, placing him one stroke ahead of Ross Fisher, Alexander Levy and overnight leader Tommy Fleetwood.
Buchanan, who left Edinburgh six years ago to take up a post at Al Ain Equestrian, Shooting & Golf Club, got into the event by winning an 18-hole qualifier for UAE PGA players.
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McIlroy, playing his first competitive round since October 8 when he shut down his injury-ravaged 2017 season much earlier than scheduled, drove the ball beautifully, but was frustrated early in his round as he could not convert his birdie chances.
"I felt like I gave myself tons of chances on the back nine and it was sort of hard to convert them", said McIlroy, who has finished second in the tournament four times. But it's a place where I always love going to play.
"You can't win the tournament after two days, you can only play yourself out of it". I feel like I really like the golf course.
"I think the wind's supposed to be up like 10 to 20 miles per hour or something, so I know that golf course can get a little mean, " Landry said.
"I've not played my best over the two days and I was ropey today, but five-over is not disastrous as it is so long out there", added the former East of Scotland Alliance champion.
Johnson said he was eager to get back to Augusta National and compete in the Masters after missing the event past year when he reportedly slipped on a wet staircase and hurt himself on the eve of the tournament.
"Today felt marginally better and was another solid day". Fleetwood managed a 68 while Johnson and McIlroy finished rounds of 64 and 66 respectively, with McIlroy bagging a timely Eagle on the 18th.