1) I have had clients REMOVE replication (both forms) because of it, well, being problematic (or worse). Bi-directional data modification/synchronization is just about the hardest nut to crack in all of data processing land (on any platform). It is simply fraught with potential issues.

2) I have often found that when reality is explained to clients about #1 above (or they go through the pain of either/both options) they magically find that they don't REALLY need bi-directional DML. That opens up numerous other options for achieving whatever their TRUE requirements actually are.

3) Can you please tell me what feature(s) of Azure could provide what you are wanting to do?