CommuniGate Pro supports multiple time zones, and different users can be located in different zones. If most of your users will use the same time zone, it is recommended to set this zone as the default one for the entire Server or for a particular Domain.
Open the Account Defaults page in the Domains section of the WebAdmin Interface if you want to set the Server-wide default time zone. If you want to set a default time zone for a particular Domain, open the Domains page of the WebAdmin Interface, open the Accounts or Settings page for the selected Domain and open the Domain Account Defaults page from there. Click the Preferences link to open the Default Preferences page.
Select the default Time Zone from the list. If you select the "built-in" zone (HostOS), the Server will use a fictitious zone that has the same time difference with GMT as the Server OS has at this time. This zone has no support for daylight saving time and it cannot be used for sending recurrent events outside your Server. Unless your Time Zone is not listed, avoid selecting the "built-in" zone.