Can't connect to my Outlook account anymore

Calendar
1

From out of nowhere, I can’t connect to my Outlook account anymore.
I get this message: (password IS correct)

2

Hello Christian,
what version of eM Client are you currently using? Find it in Help>ABout section.
How is this account set up? Is it POP/IMAP/Exchange? Or perhaps the (now discontinued) AirSync?

Regards,
Olivia

3

Hi Olivia,
I’m using v6.0.24928.0
I have no problems with reading my mail,
but the calender is synced with my Outlook.com
This seems to give problems since this morning. 
I didn’t change any settings.
And I don’t use AirSync.
Grtz Chris

4

Hello Christian,
so your account is set up as Exchange?
Can you please screenshot the Exchange Web Services tab for this account in the Tools>Accounts section?

Regards,
Olivia

5

Hi,
It’s not via Exchange.
The only service ‘enabled’ is this:
Grtz Chris

6

Hello Christian,
I see, you are using an outlook account but the issue is actually with the iCloud calendar.
iCloud added 2-step verification to its accounts.
Creating an app specific password could help.
Read more about iCloud application passwords here: https://support.apple.com/en-us/HT204397

Regards,
Olivia

7

Hi Olivia,
Yes, phew, this seemed to work! So far so good. Thanks for the help! 
Greetz Chris

8

Hey Chris,
thanks for letting us know this resolved the issue.

Regards,
Olivia