Powershell command to migrate Exchange 2007 mailbox databases with a legacy name, & import them into a new 2007 instance, with a new name.

Question

Hi All. I am currently at the later stage of provisioning a new CCR Exchange 2007 migration (to
virtualise old Exchange 2007 hardware) for 5,000 users & have a quick question.
I have created around 15 newly named storage groups, & have named 1 new DB per group, with the same name (let's say New-DB-1), residing within them.  The problem I have, is the old legacy DB's have different names (let's say Old-DB-1) & I need
to import them into the new storage groups, to match the new names. So far I can import/export between old & new OK if both old & new DB names\folders etc. names marry up perfectly, but are unable to if there not the same. Does anyone have any thoughts
on how best to tackle this, as this is one of the final hurdles stopping the migration? Many Thanks, John 

Answer 1

Hi All
Many Thanks for the feedback.
The terminology 'migrate' was used based around the fact I will be decommissioning the old 2007 physical environment. This is after moving all DB's over to the new newly created Virtual environment that will host all roles.
The solution I ended up using yesterday, was the following:
1) Dismounted the relevant named DB (NEWDB) in the new environment.
2) I then ticked the 'This database can be overwritten by a restore option' box.
3) Copied over the old named DB (OLDDB) to the same location, & overwrote using the new name (NEWDB).
4) Re-mounted the (NEWDB).
5) Ran the following 2 PowerShell commands:
 Get-mailbox –database OLDDB | move-mailbox –targetdatabase NEWDB -configurationonly:$true
 Get-MailboxDatabase NEWDB | ResetSearchIndex.ps1 -force
6) Checked to make sure the clients were working ok, in the now the new (NEWDB) environment.
Rich: Many thanks for your PS script, which I will test with future DB moves & provide feedback
J
John.