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Displaying the OOF log in a mailbox using Exchange Web Services and Powershell

On a Exchange 2007 and 2010 when changes are made to the Out of Office setting these changes are logged into an Item sitting in the Non_IPM_Subtree folder of a mailbox which has a message class of IPM.Microsoft.OOF.Log .

The log of changes is written to the body of this message and can be useful if for any reason you need a historical record of the oof setting for a particular mailbox. For instance if someone set an inappropriate OOF message and you need some evidence of this. You could also sequence this data to get picture over a certain time period of what users had their oof set and for how long it was enabled and did it say anything useful.

I've put together a script to show how to get at this log using the EWS Managed API and powershell and I've also included a parser to parse the log entries into an object to make it easier to export this data to csv or email etc.

I've put a download of this script here the script itself looks like

$MailboxName = "user@domain"
$rptCollection = @()

$dllpath = "C:\Program Files\Microsoft\Exchange\Web Services\1.1\Microsoft.Exchange.WebServices.dll"
[void][Reflection.Assembly]::LoadFile($dllpath)
$service = New-Object Microsoft.Exchange.WebServices.Data.ExchangeService([Microsoft.Exchange.WebServices.Data.ExchangeVersion]::Exchange2007_SP1)
$service.TraceEnabled = $false


$windowsIdentity = [System.Security.Principal.WindowsIdentity]::GetCurrent()
$sidbind = "LDAP://<SID=" + $windowsIdentity.user.Value.ToString() + ">"
$aceuser = [ADSI]$sidbind
# $service.Credentials = New-Object System.Net.NetworkCredential("user","password")
$service.AutodiscoverUrl($MailboxName ,{$true})

$nonipmRoot = new-object Microsoft.Exchange.WebServices.Data.FolderId([Microsoft.Exchange.WebServices.Data.WellKnownFolderName]::Root,$MailboxName)
$ivItemView = new-object Microsoft.Exchange.WebServices.Data.ItemView(2)
$sfSearchFilter = new-object Microsoft.Exchange.WebServices.Data.SearchFilter+IsEqualTo([Microsoft.Exchange.WebServices.Data.ItemSchema]::ItemClass, "IPM.Microsoft.OOF.Log")
$psPropertySet = new-object Microsoft.Exchange.WebServices.Data.PropertySet([Microsoft.Exchange.WebServices.Data.BasePropertySet]::FirstClassProperties)
$psPropertySet.RequestedBodyType = [Microsoft.Exchange.WebServices.Data.BodyType]::Text;
$fiItems = $service.finditems($nonipmRoot,$sfSearchFilter,$ivItemView)
foreach($itItem in $fiItems.Items){

$itItem.load($psPropertySet)
$itItem.Body.Text.Split("`r") | ForEach-Object{
$line = $_
if($line.indexof("Mailbox:")-gt 0){
$elen = $line.indexof("Mailbox:")
if($elen -gt 0){
$datetime = $line.SubString(1,$elen-3)
}
}
if($line.indexof("Mailbox:")-gt 0){
$slen = $line.indexof("Mailbox:")
$elen = $line.indexof("OofState:",$slen)
if($slen -gt 0){
$slen += 10
$mailbox = $line.SubString($slen,($elen-$slen)-3)
}
}
if($line.indexof("OofState:")-gt 0){
$slen = $line.indexof("OofState:")
$elen = $line.indexof("ExternalAudience:",$slen)
if($slen -gt 0){
$slen += 10
$OofState = $line.SubString($slen,($elen-$slen)-2)
}
}
if($line.indexof("ExternalAudience:")-gt 0){
$slen = $line.indexof("ExternalAudience:")
$elen = $line.indexof("InternalReply:",$slen)
if($slen -gt 0){
$slen += 18
$ExternalAudience = $line.SubString($slen,($elen-$slen)-2)
}
}
if($line.indexof("InternalReply:")-gt 0){
$slen = $line.indexof("InternalReply:")
$elen = $line.indexof("ExternalReply:",$slen)
if($slen -gt 0){
$slen += 15
$InternalReply = $line.SubString($slen,($elen-$slen)-2)
}
}
if($line.indexof("ExternalReply:")-gt 0){
$slen = $line.indexof("ExternalReply:")
$elen = $line.indexof("SetByLegacyClient:",$slen)
if($slen -gt 0){
$slen += 15
$ExternalReply = $line.SubString($slen,($elen-$slen)-2)
}
}
if($line.indexof("SetByLegacyClient:")-gt 0){
$slen = $line.indexof("SetByLegacyClient:")
$elen = $line.indexof("comment:")
if($slen -gt 0){
$slen += 20
$SetByLegacyClient = $line.SubString($slen,($elen-$slen)-3)
}
}
if($line.indexof("comment:")-gt 0){
$slen = $line.indexof("comment")
$elen = $line.indexof("'",$slen)
if($slen -gt 0){
$slen += 9
$comment = $line.SubString($slen,($elen-$slen))
}
}
$mbcomb = "" | select datetime,mailbox,OofState,ExternalAudience,InternalReply,ExternalReply,SetByLegacyClient,comment
$mbcomb.datetime = $datetime
$mbcomb.mailbox = $mailbox
$mbcomb.OofState = $OofState
$mbcomb.ExternalAudience = $ExternalAudience
$mbcomb.InternalReply = $InternalReply
$mbcomb.ExternalReply = $ExternalReply
$mbcomb.SetByLegacyClient = $SetByLegacyClient
$mbcomb.comment = $comment
$rptCollection += $mbcomb
}
}
$rptCollection
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All sample scripts and source code is provided by for illustrative purposes only. All examples are untested in different environments and therefore, I cannot guarantee or imply reliability, serviceability, or function of these programs.

All code contained herein is provided to you "AS IS" without any warranties of any kind. The implied warranties of non-infringement, merchantability and fitness for a particular purpose are expressly disclaimed.