Having updated from Mojave to Big Sur I now find I can’t sign into the Apple discussions forum, or iCloud.com, using my usual password. I went through the ‘forgot password’ routine and set a new password but it’s still not accepted.
During the setup process for Big Sur it said it was opening an iCloud account for me, when I already had one, so presumably this is the source of the problem… Is there a simple solution or do I have to contact Apple support?
I think you’ll need to contact Apple support. If you’ve ended up with another iCloud account, you’ll want to make sure to stop using the new one for anything.
Which AppleID is the Mac signed in with after the update? Are you able to sign in with your “old”:AppleID?
In any case, way back my original AppleID was just a name (eg myname) and I logged into Discussions with it. Over the years I was forced to use an email as my AppleID (myname@mac.com … myname@me.com and now myname@icloud.com ). When I sign into Discussions it automatically uses my iCloud version but this, annoyingly, asks me to create a new Discussions ID so I have to over-ride the default and use my original (non-email) AppleID.
Your issue might be related for Discussions - but the iCloud login issue is a puzzle.
Thanks for your comments (also thanks to Adam). Losing access to iCloud is very alarming! Full marks to Apple for superb support, here in Spain - during a chat of nearly an hour we analysed the problem then successfully changed to a new password using an iPhone, not my iMac. Big relief.