Hello Vlad2010,
To answer your questions
Q1: is it still requirement to have dedicated Journaling server or it can coexist with Exchange Archiving server?
A1:
I am inferring from your post that your first question is as follows:
- Currently, is there a requirement that you have dedicated EV servers for Exchange Journal Archiving and Exchange Mailbox Archiving? If this is the question then the answer is no, Exchange Journal Archiving and Exchange Mailbox Archiving can co-exist on the same Enterprise Vault server. As long as the server has enough resources to handle the load you should be fine.
Q2: What would be best approach to migrate Journaling archive to dedicated server?
A2: Given the answer to Q1 and you still need to migrate Exchange Journal archiving to a dedicated server. Your best option would be to upgrade/migrate the existing server to windows server 2012 and upgrade to EV 11.0.1. Then build out another Win2012 server, install EV, add it to the EV site and create a new Vault Store, and Journal archive. Leaving the existing Journal archive where it is, if you create the vault store in the same vault store group and configure sharing at the vault store group level OSIS would occur with any new data archived.
If there is no need to move the existing journal archive to the new server I would leave it where it lies. If there is a legal discovery performance issue, I would utilize move archive to move the existing journal archive to the new vault store after creating the new journal archive. Then the amount of time it would take to move the existing vault store would not matter.