As with some others as soon as I upgraded to Windows 10 my external email account using Outlook13 received emails but could not send. So I deleted my email and reset it but the send problem persisted. In noted that each time I did the account delete and reset a new name appeared with the name appended with ...[1], [2], [3]. Windows 10 had also set up a new PST files which I deleted and used my old one.

I managed to fix the send problem but I still have this issue that when I open account settings from Outlook I see new name and also there are now I assume somewhere on the machine multiple names for the account as running sfc didn't fix this.

Anyone any ideas how to clean this up?