Hi Peter,
thank you for the answer.
Great that you mentioned that guide because that was my first approach and the reason I raised the question. Following this guide about location extensions that you mentioned we get an error:
EXTENSION_SETTING_UPDATE_IS_A_NOOP when trying to add location extension to campaign. (this is the issue decribed in my initial/first post).
So I have existing locations on the account level, I've got their resource names and everything, but how do we link them on the campaign?
We already switched to assets, but assets do not have locations, or am I wrong?
KR,
Vedran