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Unified Communications Diagnostics 8.4.1 - Release Notes


If you have customized the communication port settings for your UC Diagnostics deployment, when you upgrade (or remove) UC Diagnostics, the customized communication port registry keys are now retained.


Two new web reports are added for Exchange Online message delivery:


You can directly launch the Office 365 Admin Center by right-clicking the Exchange Online organization node and Exchange Online service node.


Resolved issues

The customer saw the following error: “The process was terminated due to an unhandled exception, System.OutOfMemoryException.” The issue was caused by processor and memory limitations (set by default) in a large scale environment. A new retry method is implemented to ensure the test engine can handle unexpected situations.


After upgrading to Exchange 2016 CU 4, the Exchange Modern Message Delivery Health Test failed with the following error: “Organization exit status within timeout - Failed to exit. The message did not exit the Exchange organization within the timeout”. The cause was a new event ID “SENDEXTERNAL” that was introduced in the message tracking log file in CU 4. The new event ID is now supported.


Known issues

Do not install UC Diagnostics on the same machine as Spotlight on Active Directory or as MessageStats.


The Collector Recovery executable file crashes occasionally. There is a “Spotlight has Stopped working” error (Application Name: CollectorRecovery.exe) that is popped up.


Go to the Task Scheduler and select the Spotlight Distributed Collector Recovery to disable it.


When running the Exchange External Message Delivery Health Test against Exchange 2013 in which the CAS server is behind a load balancer, the test did not complete and it failed with the error “Failed to open the default message store”.


Remove the Exchange External Message Delivery Health Test and run the Exchange Modern Message Delivery Health Test instead.


If you are upgrading from 8.2 and earlier, some health tests will not run immediately for Exchange 2016. You must edit each test once and click Finish to cause the previous test to run and retrieve some of the counter values correctly. The tests that must be edited after upgrade are as follows:


For a Skype for Business/Lync environment, if a DNS Alias record is configured for a front-end pool or standard edition server rather than a Host A record, UC Diagnostics will fail to discover and run the synthetic transaction health tests with that pool or server. This issue is only found on 32-bit and 64-bit systems of Windows 2008. Newer operating systems do not have this issue.


In Skype for Business or Lync Discovery, the display name of PstnGateway only shows the numbers/characters before the first dot. There is a problem when PstnGateway name is an IP address.


Upgrading from version 8.2 or later

As of UC Diagnostics 8.3, Exchange 2000 and Exchange 2003 are not supported. If you are upgrading from UC Diagnostics 8.2, use the Force Discovery Now option to repopulate your topology view. If you are upgrading from 8.3, use this option to ensure Exchange version service pack and CU (cumulative update) information is shown for Exchange servers.


Click Force Discovery Now from the menu.



If the BlackBerry Server Health Test runs on a standby BlackBerry server in a high availability configuration, the test results show errors for BlackBerry services that are not running. However, these services are not required to run in the standby server and no error exists.

Workaround: Perform the BlackBerry server health test on the primary BlackBerry server only, or run a separate BlackBerry server health test on the standby BlackBerry server with the affected service counters set to 'informational'.


If you are installing Exchange 2013 and have upgraded to the newest version of MAPI & CDO (version 6.5.8320.0) to support RPC over HTTP) in a mixed environment, some health tests may not run properly. ESM and MAPI & CDO might not work together.

Workaround: Uninstall ESM. Reinstall the new MAPI & CDO for Exchange:


UC Diagnostics 8.4.1 has been rebranded to the Quest company name and the installation path now is Quest. After you upgrade to 8.4.1, the Save As Template and Save As (Drilldown/AlarmLog) dialogs might still point to the previous installation path since Windows saved the path in the registry.


You must manually redirect and save to the new default Quest path such as "%current_user%\AppData\Roaming\Quest\Shared\Templates".


On a Windows Server 2016, when you launch the Diagnostics Console for the first time, you can see the following error: “There is no default printer currently selected.”


Open the Devices and Printer page by selecting either:

All subsequent launches of the Diagnostic Console will be successful.


If there is no Reverse Lookup Pointer (PTR) created for the target Lync 2013 Server in a different domain and users connect the server with its NetBIOS name, the Lync 2013 plug-in of the diagnostic console is unable to get values for some components.


Add a Reverse Lookup Pointer (PTR) for the Lync 2013 Serve in the “Reverse Lookup Zones” of DNS.


In Data Recorder Mode, if you connect to a Lync 2013 or Skype for Business 2015 Server with the NetBIOS name (such as wm-skp-st), the home page does not display properly. Some components are greyed out in the Diagnostics Console Play Back Mode.


Use the server FQDN instead of the NetBIOS name when you connect in Data Recorder Mode.


On Windows Server 2016, when you opened Web Reports, the web site would fail if Internet Explorer was not set as the default browser.


Set Internet Explorer as the default browser on the computer that is running Windows Server 2016.


On Windows Server 2016, if the account that is running Web Reports is not a domain administrator, the following issues can occur:

User is unable to open Subscriptions | Configure Subscriptions.




On Windows Server 2016, when you are creating a custom report in Web Reports, the Preview option does not work correctly for data for a large number groups.


Do not preview the custom report in the wizard. Click Finish. Then click Preview on the toolbar.


Even though the SMTP Server and SMTP From Address were not configured for a subscription, when the user ran the subscription, the result showed Success.

Always ensure that you have configured the SMTP server and SMTP From Address before you run a report subscription.


Web Reports support Skype for Business 2015. As of UC Diagnostics 8.2, the names of the Lync web reports were changed to reflect both Lync and Skype for Business.

If you upgrade from a release before 8.2, the existing subscriptions for the Lync Web Reports will fail. You must re-add each Lync/Skype report to the subscription and save the subscription.


In Web Reports, select File | Subscriptions.
Select the Reports link.
Click Finish.


Web Reports fail to open from the Management Console (MMC snap-in) if Web Reports is using another web site rather than the default web site with 80 port.



When UAC is enabled, Web Report pops up an error to say that it has no enough permission to read Web Report related folders, such as, C:\Inetpub\wwwroot\UCDiagnostics\Reports.



System requirements


Processor x86 or x64, running at a minimum speed of 2 GHz


8 GB

Hard disk space

300 MB on system drive for application.

Historical reporting database requires additional space.

For more information, see the Unified Communications Diagnostics Deployment Guide.

Local Windows Administrator privileges are required on the computer where the product is installed. For more detailed permissions for operating UC Diagnostics, see the Unified Communications Diagnostics Deployment Guide.

Operating system

One of the following:


One of the following:

Diagnostic Services (Health Tests) for all environments

The following software is required for diagnostic services (health tests) to run on any environment:

You can download Microsoft MAPI & CDO from the Microsoft web site here:

Diagnostic Console for all Environments

Web reports

For installing Web Reports, you need one of the following:

For viewing Web Reports, you need:

Requirements for specific operating systems:

For detailed requirements and a list of rights and permissions necessary for product operation, refer to the Unified Communications Diagnostics Deployment Guide.

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