Hello Community :)
Recently I got the basic Office 365 product and I installed it on PC.
I setup Outlook and logged into with my Microsoft username (email@example.com)
Now i tried to get the initial gmx mailbox which is basically the same (firstname.lastname@example.org) as IMAP but it says "this account is already used".
The window which lets you decide between outlook.com|O365|Imap|Pop3 does not open since it says it's already used.
Is there any workaround?