Since Thursday evening Outlook client has been constantly asking to input password and because of that it is unable to connect to server. Typing correct password does not help in this case. The problem lies within Microsoft’s O365 service and we are working to fix it.
In the meantime, you can still use Outlook’s browser based version (https://o365.jamk.fi).
We will update this article if and when situation changes. Sorry about any inconvenience.
Problem is now located and it is fixed.