We do use AAM to create audience from site behaviour and onboarded data. We also use DCM to serve personalised banners on our site to these visitors.
I did notice that all of the audiences that are shared with DCM does produce floodlight tags (URL integration). Is there a way to avoid these multiple Floodlight tags to fire? is it possible to do a server to server integration with DCM?
As far as I know you'll need to create a new one because that setting cannot be modified.
It should not affect your audiences, the destination will still fire the segment IDs .. just in a different way.
If i do have a current DCM destination set as URL and that is not "serialised". Is it possible to change it to "serialise"? Will it affect my audiences in DCM? Or do i have to create a new one?
I believe that for URL destinations, you have the possibility to 'serialise' ... which lets you lets you send segments to a destination sequentially rather than making separate calls for each segment
There is also an S2S integration - please see previous post Integration between UUIDs & DoubleClick
Hope that helps,