This article provides information on the compatibility of Kerio Connect and Outlook on iOS and Android applications when using the Exchange ActiveSync (EAS) protocol.
In the recent version of the Outlook mobile app (released in the middle of October 2019), Microsoft introduced a significant change with the way ActiveSync works with other applications.
Outlook now uses a new hybrid authentication process. It sends validation requests to the MS/O365 servers and submits all Kerio Connect user data (including usernames and passwords, emails, meetings, etc.) to the Exchange Online/MS servers.
Unfortunately, the Kerio Connect versions (9.2.11 and older) are not compatible with this technique. We recommend using the following alternatives, as a workaround: