This mailbox database contains one or more mailboxes, mailbox plans, archive mailboxes, public folder mailboxes, soft deleted ...

This mailbox database contains one or more mailboxes, mailbox plans, archive mailboxes, public folder mailboxes, soft deleted mailboxes or arbitration mailboxes. To get a list of all mailboxes in this database, run the command Get-Mailbox -Database . To get a list of all mailbox plans in this database, run the command Get-MailboxPlan. To get a list of archive mailboxes in this database, run the command Get-Mailbox -Database  -Archive. To get a list of all public folder mailboxes in this database, run the command Get-Mailbox -Database  -PublicFolder. To get a list of all arbitration mailboxes in this database, run the command Get-Mailbox -Database  -Arbitration. To get a list of all soft deleted mailboxes in this database, run the command Get-Mailbox -Database  -SoftDeletedMailbox. To disable a non-arbitration mailbox so that you can delete the mailbox database, run the command Disable-Mailbox . To disable an archive mailbox so you can delete the mailbox database, run the command Disable-Mailbox  -Archive. To disable a public folder mailbox so that you can delete the mailbox database, run the command Disable-Mailbox  -PublicFolder. Arbitration mailboxes should be moved to another server; to do this, run the command New-MoveRequest . If this is the last server in the organization, run the command Disable-Mailbox  -Arbitration -DisableLastArbitrationMailboxAllowed to disable the arbitration mailbox. Mailbox plans should be moved to another server; to do this, run the command Set-MailboxPlan  -Database .