The daily sync for Constant Contact will automatically sync the preferred name and email address of your contacts from Realm. However, if you need to disable the sync, you can turn it off for each Constant Contact account linked in Realm.
In the top-left corner, click your ministry hub then Realm. Then click Settings > Additional Features.
Next to Constant Contact Sync, click Edit Settings.
Under the Constant Contact account, turn off Enable daily sync.