Exchange 2013 Error Message - “Load balancing failed to find a valid mailbox database”

Error Message:

Load balancing failed to find a valid mailbox database.

    + CategoryInfo          : NotSpecified: (0:Int32) [New-Mailbox], RecipientTaskException

    + FullyQualifiedErrorId : [Server=EX2013,RequestId=7b6c4983-0b44-4f32-85fa-57765273dd1e,TimeStamp=3/25/2014 6:26:18 AM] [FailureCategory=Cmdlet-RecipientTaskException] 200D732F,Microsoft.Exchange.Management.RecipientTasks.NewMailbox

    + PSComputerName        : ex2013.lab.com

Workaround:

[PS] C:\Windows\system32>New-Mailbox -Alias Raji -Name "Raji Subramanian" -FirstName Raji -LastName Subramanian -DisplayName "Raji Subramanian" -UserPrincipalName RajiS@lab.com -Password (ConvertTo-SecureString -String 'Pa$$word1' -AsPlainText -Force) -Database 'Mailbox Database 1257518034'

Solution:

Verifying the provision

get-mailboxdatabase | ft name,isexcludedfromprovisioning

Disabling the isexcludedfromprovisioning

Get-mailboxdatabase | set-mailboxdatabase -isexcludedfromprovisioning $false

Verifying again on creating mailbox

Worked Perfectly

What is the purpose of  isexcludedfromprovisioning Parameter ?

Note from Technet : http://technet.microsoft.com/en-us/library/ff477621(v=exchg.150).aspx

The IsExcludedFromProvisioning parameter has have two valid values, $True and $False. When you set this property to $True, the mailbox database is excluded from the automatic distribution process. When you set it to $False, the mailbox database is included in the automatic distribution process. The default value is $False.

When a mailbox database is excluded from automatic distribution, the only way to create a mailbox in, or move a mailbox to, the database is to use the Database parameter on the New-Mailbox and Enable-Mailbox cmdlets or the TargetDatabase parameter on the New-MoveRequest cmdlet.