I recently discovered my old gmail address is no longer valid, possibly cancelled by Google for no access by me within 5 months or so. Possibly my gmail account had been compromised, I read recently they had a hacking incident a few months ago. I am unable to log in to my gmail email account, password seems to have been changed, probably reset by Google but maybe by a hacker. I was using the gmail address as my Apple ID for last 5 years. So I decided I better change my Apple ID to use my iCloud email address, since iCloud email is what I have been using for almost 5 years, and I'm unlikely to leave the Apple ecosystem anytime soon. I signed out of iCloud on all my devices (iPad 2, iPad Air, Apple TV 3), since this is recommended before resetting the Apple ID. On my Mac Mini I went to www.iCloud.com to set up my new iCloud email, to change my Apple ID accordingly. However the account management icloud.com page just goes into a wait state and does not return, when I try to set the new email address, so I just cancel after a few minutes of waiting. Also in the last few minutes it is giving me a "403 Forbidden" server error when I try to manage my iCloud settings. What's going on, is Apple's iCloud server management system on the fritz???