Conversation history not saving in Outlook 2010

Recently I ran into an issue with a Lync environment (2010) where Lync conversations were not being saved to the “Conversation History” folder in Outlook (2010).  Luckily there is a quick way to fix this issue, through Exchange.  From the reading that I have done it seems like the most common reason this occurs is when a user in your Exchange environment reaches or surpasses 1,000 combined folders and sub folders in their mailbox.  The easiest way to check if a user has reached this threshold is to use the Exchange Management Shell to quickly take a look at their total combined mailbox folders using the following command.

(Get-MailboxFolderStatistics “user”).Count

Easy enough, often times this is enough to determine the cause.  But I have taken this command one step further and wrapped it into a little script that will go through your Exchange environment and record all users that have reached this threshold and place their display name as well as the number of folders/subfolders into a csv file for an easier to reference.  Here is the logic of the script.

$mailboxes = Get-Mailbox
$overlimit = @()

ForEach ($mailbox in $mailboxes) {

$mbxmember = New-Object PSObject
$folders = (Get-MailboxFolderStatistics $mailbox).Count
$mbxmember | Add-Member -MemberType NoteProperty -Name "Display Name" -Value $mailbox.DisplayName
$mbxmember | Add-Member -MemberType NoteProperty –Name “Folder Count” –Value $folders

	If ($folders -gt 1000) {
		$overlimit += $mbxmember


That logic right there is very basic but will iterate over all mailboxes in the Exchange environment, grab those with over 1,000 folders/sub folders, place them into an array and output the array.  This will take a while depending on the size of your environment, so feel free to let it run in the background.  It is not a super intensive process, it just takes forever.  To get this into a CSV file use the following Powershell command, I have this script name Get-Folders.ps1 in this example.

.\Get-Folders.ps1 | Export-CSV users.csv

That should be it.  Not everybody will need this obviously but I found that it came in handy.

About the Author: Josh Reichardt

Josh is the creator of this blog, a system administrator and a contributor to other technology communities such as /r/sysadmin and Ops School. You can also find him on Twitter and Google+.

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