You can select “Client application synchronization interval” for Outlook on Windows. Mac clients will get an update notification within 5 min. Account admins can select one of 6 predefined values. Client application honors this setting since v3.0.18 which were rolled out during Sep 28, 2016.
Preferences > General > Preferences:
The Xink App application will read on start, on “Update Now” and automatically as per the synchronization interval setting. If it detects any changes, it applies to them.
We recommend Xink Brand admins to set a longer period as email signature updates normally don't require frequent updates.
We recommend Xink Campaign admins to check with their Campaign administrator (Admins menu).