In order to send a global availability and prices update go to Availability and Rate Calendar:
1. Press Global Portal Update button
2. Choose the portal you want to send the update to
3. Choose the number of months you want to update
4. Click START
Global update is also sent automatically on saving settings of the connection in Channel Manager. Just open the plugin in Channel Manager, click on Next button until you see the summary of the connection. On that moment, the system sends the global update for next 365 days.