Not all contacts show in Android Contacts, phone does not show all contacts
Once in a while the native Android Contacts app may lose its Contacts. This is a fairly common issue with the Android Contacts app rather than DejaOffice, but if it happens to you it can in most cases be resolved with a couple simple steps.
1. Open DejaOffice and long press the Read Android Data button until you see an option to Reread all data
2. Tap Reread all data
This will perform a sync between DejaContacts and the native Android Contacts App, restoring your contacts.