And why? It does nothing!
Trying to post. It says correct the highlighted errors and try again. Nothing is highlighted!
It also says "Post Flooding detected". What???? It won't let me post!! Your programmers are freaking idiots!
This does not seems to be an O365 or Outlook issue but rather a iCloud add-in issue, users reported this in Outlook version of 2010, see below:-https://answers.microsoft.com/en-us/msoffice/forum/all/icloud-addin-wrong-password-message-in-outloo...
If this would have been an O365 side issue, half the world would be on fire.