do the math counting all the VMs you're going to have in inbox and deleted. the unity design guide contains a table that has an aprox of how much space it takes 1 minute of recording based on the codec.
you would need to take an average message length x codec size to know how much disk space they would take.
in any case you determine the space allocated in exchange so you could simply allocate x amount of minutes based on the size of the mailbox. you cannot determine you're going to allow Y number of VMs since it's based on the size.
the Message Store STatus dump report cranks out a huge amount of data about the messages in each user's mailbox includng the deleted message count and deleted message size which you can use to get the average you're looking for. Been a long time since I've fired up MSM but I recall this report can take a while to run given all the information it's extracting and it's best to run it off hours because it hammers the Exchange mailstore pretty good if memory serves.
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...