you'd need more than one Unity server to handle 50,000 users if that's what you're asking. This can be done, roughly, by adding multiple users into the same "dialing domain" such that everyone could be found by name/id for internal and external callers, transfers and the like. There are some limitations to this model, however. Namely that audio text applications don't replicate around to each server.
The NetworkingOverview2001.doc on the AnswerMonkey general tools site goes over the details/limitations of such a deployment. You should probably start there to get a handle on what you're wanting to do.
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...