Error: com.apple.appleaccount error 403
Recreate Error: On a Iphone/Ipad device that has "already" created the maximum of 3 per device Apple limit of ICloud account creation attempt to create or login to ICloud service tab in Settings. You will be presented with "com.apple.appleaccount error 403" which does not tell the laymen anything useful.
Cause: IOS 7 reports a "best guess" error instead of detailed error explanation.
How To Resolve Error: Find a device that has not been used to create an ICloud account the maximum 3 times and use it to create the ICloud account by logging into the Settings/ICloud tab with the Apple ID you want a ICloud account created for.
Keep in mind this will use up one of the three lifetime allowed ICloud account creations allowed by Apple on that device.
Also per support: If an existing account is logged into the ICloud service. A. Backup phone using iTunes on a mac/pc. B. At bottome of Settings/ICloud Delete the account "AND" all the user date from the phone. It will offer the Delete all data option. The reason for Deletion(and is why we backed up on a pc vs. the cloud) is when you create the new ICloud account it will backup all of the Device owners information to the wrong persons account.
Once you have created the new ICloud account log into that account on device that was presenting error: "com.apple.appleaccount error 403" it should allow the ICloud login.
Once you have verified the "device with error" is ICloud functional delete the ICloud account from the device used to seed the ICloud account and delete again all user data from cloud. Restore the recently created mac/pc Itunes locally created backup to the phone and then go to Settings/ICloud and login with the device owners Apple ID and password and verify your backup to the ICloud settings and Eureka! your done.