iMessage: unable to verify email address already in use

[Foxdog175]

Anyone running into this error when setting up iMessage on their iPad? I login using my AppleID (@mac address). The next screen asks for an email address. I type mine in (@me address) and it says, "Unable to verify email because it's already in use." What's going on here?

 

[testcard]

Yes. Set up OK and working on iPhone but same error as you on iPad.