==== Required information ====
- iRedMail version (check /etc/iredmail-release): 0.9.7 MySQL with SOGo
- Linux/BSD distribution name and version: Ubuntu 16.04LTS
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MySQL
- Web server (Apache or Nginx): Nginx
- Manage mail accounts with iRedAdmin-Pro? No
- [IMPORTANT] Related original log or error message is required if you're experiencing an issue.
====

I'm currently setting up the new mailserver.
I'm using SOGo groupware and planning to use Outlook 2016 and 365 with activesync.

I have noticed a strange problem with the sync of the calendar.

When I add an calendar item in Outlook without a reminder, it shows up in the webmail or an other device with a reminder.
Maybe it's an Microsoft error, because when I add an item with my smartphone there is no issue.

When added an calender item with a reminder, the reminder time is correctly send.

Does anyone know this issue and how to solve?

Regards,
Edwin