If we are just talking synchronization then yes, you can synchronize from two separate AD environments. However, you must ensure that the versions are the same and that the user attribute you are using is guaranteed to be unique in both AD forests.
Authentication, on the other hand, is a little different. You specify the LDAP auth agreement to a single AD forest. So, unless you are talking about two different AD trees in the same forest AND you have the appropriate trust relationships in place, you are not going to be able to support LDAP authentication.
One of the things you could look at is MS ADAM. I have researched this but have not used it. The idea is that ADAM can pull info from separate AD envorinments and become a clearing house or aggregation point, if you will. That is probably a poor explanation but the characterization isn't really all that far off. You still have to ensure that your UID attribute is unique but ADAM can do some normalization (from what I understand).
The best place to start reading up on this is the UC SRND (www.cisco.com/go/srnd)
How are you? coming to your question, Yes, it is possible to integrate multiple AD's with one CUCM, but before Integrating the AD make sure to update all user information in the AD and based on that information create the Filters.
One of the useful document path given below, please have a look.
SIP traces provide key information in troubleshooting SIP Trunks, SIP
endpoints and other SIP related issues. Even though these traces are in
clear text, these texts can be gibberish unless you understand fully
what they mean. This document attempts to br...
Please find the attached HTML document, download and open it on your PC.
This provides an easy to use form where you simply answer a few
questions and it will render the proper jabber-config.xml file for you
to copy/paste. There is built in logic to verif...
CUCM Database Replication is an area in which Cisco customers and
partners have asked for more in-depth training in being able to properly
assess a replication problem and potentially resolve an issue without
involving TAC. This document discusses the bas...