# Datasync

There are several places that do not require no data provision from the backend:

- DataSync 
    - Document
    - Leads
    - FacingSummary
    - Activity
    - Settings
- DeDeQuery
- Appointments
 

With DataSync, the clients always transfer the amendments to and from the server. This also applies if Employee A creates and sends something, then Employee B automatically receives it with the next transfer.

However, DataSync has an internal cache, so it cannot be queried every second. So if a transfer was made 30 seconds ago and then someone else sends something, you do not immediately get the new data because of the cache.