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Deleting Exchange Server Default Database in a multiple Active Directory domains environment

Hi,
It might be tricky if you want to delete the default mailbox dabase if you have a forest root Active Directory domain and Exchange server is installed in a child domain.

Normally you would do the following:
1- Get all arbitration mailboxes:

get-mailbox -database - arbitration
2-Move the resulting accounts to another Database:

get-mailbox -database - arbitration | New-moverequest -targetdatabase

But you have to do these extra steps in order to fully remove the system mailboxes and be able to remove the database:

1-Get all arbitration mailboxes using the DomainController switch specifying a DC in the Root Domain.

get-mailbox -database   -domaincontroller  - arbitration


2-Move the resulting accounts to another Database:


get-mailbox -database   -domaincontroller - arbitration | New-moverequest -targetdatabase -domaincontroller
3- And now you can successfully remove the database!


 











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