Restore-SharedMbxOoo.ps1

<#
.Synopsis
   Restores Out of Office Message for all shared mailboxes
.DESCRIPTION
   Taking a path as input to location of backups created with the corrosponding cmdlet Set-SharedMbxOoo,
   this cmdlet gets all current mailboxes in specific OU, loops through and restores (if any) Out of
   Office message plus parameters defined for the message.
.EXAMPLE
   Set-SharedMbxOoo -Path C:\Temp\BackupOfOoo\
.NOTES
   Version:        1.0
   Author:         James Pettigrove
#>
function Restore-SharedMbxOoo
{
    [CmdletBinding()]
    [Alias()]
    [OutputType([int])]
    Param
    (
        # Param1 help description
        [Parameter(Mandatory=$true,
                   ValueFromPipelineByPropertyName=$false,
                   Position=0)]
        [string]$Path = $PSCommandPath
    )

    Begin
    {
        if (! (Get-PSSnapin Microsoft.Exchange.Management.PowerShell.E2010 -ErrorAction:SilentlyContinue) )
        {
            Add-PSSnapin Microsoft.Exchange.Management.PowerShell.E2010 -ErrorAction:Stop
        }
    }
    Process
    {
        #Get all Shared Mailboxes and loop through each mailbox
        $Mbx = Get-Mailbox -OrganizationalUnit "OU=Shared Mailboxes,OU=Users,DC=contoso,DC=co"
        ForEach ($M in $Mbx)
        {
            Write-Host "Restoring auto-reply for shared mailbox:" $M.DisplayName
            $OldOOO = Import-Csv -Path "$Path$($M.Alias).csv"
    
            Set-MailboxAutoReplyConfiguration -Identity $M.Alias `
            -AutoReplyState $OldOOO.AutoReplyState `
            -EndTime $OldOOO.EndTime `
            -ExternalAudience $OldOOO.ExternalAudience `
            -ExternalMessage $OldOOO.ExternalMessage `
            -InternalMessage $OldOOO.InternalMessage `
            -StartTime $OldOOO.StartTime
        }
    }
}

Restore-SharedMbxOoo