14 year old daughter's apple id not working on new airbook purchased for her
We just bought a new MacBook Air for our 14 year old daughter. She is trying to sign in with her own Apple ID, but it is not working.
Error messages are: "Verification failed. Your Apple ID or password is incorrect."
When we press the prompt "Forgot Apple ID or password" and she puts in her Apple ID the message we are getting is: "This Apple ID is not valid or not supported."
Then, there is another prompt we tried, which says "Forgot Apple ID". Here, you put in the name and email address. After doing that, the error message states: "We can't find an Apple ID matching the information provided."
She has an Apple ID that she has been using on her iphone for a year with no problem.
What can we do?
Thank you for your help.
MacBook Air