Hi Igor,
Sitelinks with ORIGIN=USER needs to be updated by the user. You'd need to
- Add new columns in the feed for upgraded url fields
- Add proper feed mapping for the new columns
- Migrate the urls as per the upgraded urls rules.
Sitelinks which aren't upgraded and belonging to ORIGIN=USER would eventually stop serving if left unattended, but as of now we haven't announced a date when this behaviour kicks in.
Cheers,
Anash P. Oommen,
AdWords API Advisor