Hi,
The data in AW databases is synchronized when th Distributor is up again.
The configuration data is populated with the most recent data in logger database configuration, and all the registries in the historical databases in the logger are sent to the HDS, if you have set up an HDS in your distributor place.
You have to consider the retention period in the Logger Databases and in the HDS, for historical data, so if you have problems in the AW, for example for 5 days, and your retention period in the Logger historical tables is 4 days, when the AW synchronizes with the logger you will lost the historical data of those four days.
Hope this helps,
Juan Luis