Each portion of the sync program can be set with the service account using the basic sync rules and then adding the users to the new policy. For simplicity, the calendar sync is shown below. In order to manage ZynSync for users, an email service account needs to be set up in the Admin -> Service account area of the app.zynbit.com dashboard. The Exchange service account can use either impersonation or delegation, depending on your organizational requirements.
Choose the teal ZynSync icon from the left column on main page.
Set up the email Service Account using the orange icon.
Open the teal ZynSync icon and look at the calendar tab. Note that the Sync Rules tab is the same as the user Sync Rules except that an additional Sync Users tab is visible behind the Rules tab. Set the rules just as you would for a personal sync user. (Please see this article for calendar sync setup.)
Once the sync Rules are created, click Save Settings.
Open the Users tab and choose the users for whom you would like to start sync.
Check the box beside each users name to select that user. If the email field indicates a drop down, more that one email inbox may be connected. Be sure to choose the correct item before starting the sync. Once the relevant users are selected, click Start Selected to begin syncing. If Sync Rules are changed in the future, sync should be stopped for those currently syncing, using the Stop Selected button in the process above. Then the sync can be restarted using the new rules.
If only a few users need to be managed, the button beside each user record will also allow admin control for that person.