“An App ID with bundle identifier X is not available. Please enter a different string” (Xcode 7.3)

Question

After updating to the latest build of Xcode 7.3 (7D175), every time I try to Export for adhoc distribution I get the above error. Everything was working fine up until the up

Answer 1

I was getting this error using Xcode 7.3.1. The cause was using the wrong "Team" on the General tab of the main target. I had my company's Team, and my own AppleID that was a "Free" personal account. After I switched to my company's Team, the error went away.