This is Unity 4.2 on existing Exch2003 in Unified Messaging configuration.
Is the MSM suitable for UM? I have used it in VM only installations, but can it be configured to only flush/move voice messages only? I don't want to touch the customer's regular data email on their Exchange.
Probably not. It will actually move everything in the inbox. It's basically a script that runs EXMERGE, which is a microsoft tool for moving, migrating Exchange users mailboxes from one server to another.
If you want, test it on a mailbox that has both email and voicemail. MSM should grab it all and move it to a PST folder. When you run it again, it will grab that PST folder and import it into the new store with either creating a new account, or if the aliass match, import into that account.
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.