Thanks for the reply,
OK, if the request of username and password is unchecked in the Database Connection properties, Arcmap always will prompt for that information, and viceversa, is it that correct? I can understand that, but anyway, doing it or not, in my case does not affect as all my links remain broken.
What I did, if this helps, was importing into an empty Arcmap document a feature service (with both mapping and feature access capabilities ON) stored in ArcGIS and with several feature classes. Then, if you can visualize the context when adding a feature service into the table of contents, all geometries appear below a group folder structure named as the map service.
I changed that structure and re-located the layers in my TOC. Then, saved. Now, if I open the mxd file connections broken....
I am asking for solutions but I presume you cannot change the given structure of the feature service once is added to the TOC. Is that correct?
Jose.