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Exchange 2016 / Lync – Troubleshooting Conversation History

Let’s take a look at troubleshooting Conversation History – Exchange/Lync.

There are multiple points that should be checked:

  • From Lync client side there is an option that should be checked: Tools – Options – Personal – Save IM Conversations in my email conversation history folder

    This option may be set by user or by client policy using Set-csclientpolicy by setting the parameter “EnableIMAutoArchiving”

Set-csclientpolicy –identity ClientPolicyName -EnableIMAutoArchiving [$True, $False, NULL]

  • $True: that sets the checkbox to on and grays out the option that unable the user to change it.
  • $False: that sets the checkbox to off and grays out the option that unable the user to change it.
  • NULL “the default option”: that doesn’t set the checkbox and the user should set it if want.
  • From Outlook side if the number of folders is more than 1000 folder that will stop conversation history function

    That can be determined from Exchange management shell “(Get-mailboxfolderstatistics “mailbox”).count”

  • The EWS should be configured correctly for the Lync and Exchange integration; the Lync client should retrieve the EWS information from the DNS records of the auto discover and web services:

    https://<smtp domain>/autodiscover/autodiscover.xml

    https://autodiscover.<smtp domain>/autodiscover/autodiscover.xml

    http://autodiscover.<smtp domain>/autodiscover/autodiscover.xml

    Auto discover SRV record (_autodiscover._tcp.smtpdomain)

    To check the EWS functionality you should check the below:

    • From Lync client side:

      Press shift + right click on Lync from taskbar

        Check the EWS URL that should be exist:

  • From Exchange Side:
    • Check if the EWS virtual directory is configured by command:

    “Get-WebServicesVirtualDirectory | FL”

    And if not configured you should set it by the command:

    “Set-WebServicesVirtualDirectory -Identity “ServernameEWS default web site” -ExternalURL “” -InternalURL “”

    • Set the authentication type of your Autodiscover and EWS Virtual directories to “BasicAuthentication” by the below commands:

      [Set-autodiscovervirtualdirectory -identity “autodiscover default website” -Basicauthentication $True]

             [Set-Webservicevirtualdirectory -Identity “ServernameEWS default web site” -Basicauthentication $True]

Ratish Nair

Microsoft MVP | Office Servers and Services

Team @MSExchangeGuru

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