data migration using extension setting service

[Albert Wang]

If you've only used feeds created by the AdWords user interface, you can use extension setting services immediately.
However, if you've created custom feeds with the API, you'll need to first perform the following steps:

Allow me to confirm(double check), as long as I have been using the legacy feed service to create feeds, if I decide to switch to extension service, then I have to migrate all data to extension service, and I lost the ability to operate them using the legacy service. or I can migrate back ?

 

[Anthony Madrigal]

Hi Albert,

I have not seen any cases in which users migrate backwards to the legacy services, but theoretically, it should be possible. We recommend not using both at the same time. As long as you're using one and are consistent, you should be fine. 

I suggest going over the Should I Migrate section of the Extension Setting Services guide to see if your use case fits either the legacy or extension setting services.

Regards,

Anthony

AdWords API Team