Should I scold my dog for messing in the house if I couldn't get home to let him out?

I have recently taken a dog for my friend that is moving and can’t bring him with her. Everyday I go home on my lunch break to let him out. I’m the only person in the office today and was unable to leave for lunch so I’m expecting a mess when I get home, should I scold him even though it isn’t his fault? He is my first dog and have only had him for a week so I’m not sure what the maximum amount of time he can “hold it.” And I would feel bad scolding him for something he had no control over’