Cannot logon to iCloud.com - stuck on verify email dialog
I spoke with Apple Support. They did not see any obvious reason for initially not beeing able to log on to iCloud. I told about my workaround to use iPhone to login, and changing the ID from @me.com to @icloud.com.
They were not able to help me switch back from @icloud to @me as my primary id. It might be because some days between changes are needed. They said I could still logon both with the primary and secondary id, and that it did not have any major consequences. So we closed the issue without further investigation. Now, several months later I tried to change back to @me.com as my primary id for curiosity. First I got an error message, but then it worked on the second try. Next time I will probably call Apple Support first thing, without experimenting too much with this ID.