SBS 2011 add user wizard fails to create Exchange mailbox,
Review log: C:\Program Files\Windows Small Business Server\Logs\adduser.log

[600] 110124.182639.8611: Messaging: Executed management shell command: get-MailboxDatabase
[600] 110124.182639.8954: Messaging: End Microsoft.WindowsServerSolutions.Messaging.Management.MessagingRunspace.StaticExecute
[600] 110124.182639.9013: Messaging: MessagingTaskException: Unable to find default mailbox database with name [] – Check access and verify if mailbox database exists – Error# (80004)
[600] 110124.182639.9170: AdminTME: Status: TaskId = MessagingTasks.TaskCreateMailbox, RootTaskId = TaskCreateUser, Success: True, Warning: True, Continue: True, Message: Unable to find default mailbox database. Make sure mailbox database exists and you have access to view the database.

 

  1. Get name of Exchange database using EMS with command “Get-MailboxDatabase”
  2. Open regedit and navigate to:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\SmallBusinessServer\Messaging\
  3. Create new String Value:
    Type: REG_SZ
    Name: MailboxDatabaseName
    Value: [Database name]

Fix: Microsoft Support