Replication of CRM databases is now supported by Microsoft

Two documents were published by Microsoft to enable transactional replication of data between CRM Databases. Yes, it is supported, but only a commercial reasonable support will be provided.

A note here, only data that was created by replication can be replicated, so it’s not a workaround to write directly in the CRM database ;)

Supportability
Commercially reasonable support will be provided for the SQL replication based solution described within this document. Commercially reasonable support is defined as all reasonable support efforts by Microsoft Customer Service and Support that do not require Microsoft Dynamics CRM code fixes. This support extends to Microsoft provided code and samples, but not to custom developed code which is the responsibility of the ISV or developer.

 http://m3r.ca/g/a9hi