In order for user to copy out the list of their contact to csv or vCard file type,follow below steps:
1. Log into Ximplify webmail at mail.domainname
2. Navigate to Contact and click at contact.You can choose to export 'My contact' or 'Global address list'.Your domain's user list included in Global address list.So here I choose 'Global Address List'
3. Then click Action -> Select All . Once selected,click Action -> Export -> Export to CSV (or any file type you need)