Dynamics 365 for Outlook – How to uninstall it manually

Dynamics 365 for Outlook a.k.a Outlook COM add-in has been announced for deprecation by Microsoft in 2020. As a support engineer, I have been receiving some requests for advising on transition to Dynamics 365 App for Outlook (confused naming by Microsoft, I know right?) as well as guidances for fully uninstalling Dynamics 365 for Outlook.

The usual method for uninstalling Dynamics 365 is by navigating to Control Panel – Programs and FeaturesUninstall or change a program and select Microsoft Dynamics 365 for Microsoft Office Outlook.

However, the above method doesn’t always work because of corrupted uninstallation files causing some behaviors below:

– An error popups when uninstalling.

– The option for uninstallation doesn’t show up in Uninstall or change a program.

– Whenever you perform the removal, the installation window popups instead of uninstallation ones.


Method 1: Use Microsoft’s Program Install and Uninstall troubleshooter

  1. Download and run the troubleshooter tool from this Microsoft’s support article.
  2. Click on Next -> Waiting for a bit -> Select Uninstalling
  1. Wait for a bit -> Select “Microsoft Dynamics 365 for Microsoft Office Outlook”
  1. Next -> Select “Yes, try uninstall”.
  2. Wait for the uninstallation to be done (this will take just a while)
  1. After that, this window should appear.
  1. Accessing Control Panel -> Uninstall a Program -> Try to uninstall MS D365 for Outlook -> This should show up.
  1. Click “Yes” and I believe the uninstallation is done!

Method 2: In case the above one doesn’ work.

Follow below steps to manually clear the corrupt registry keys:

Rename/Delete the “client” folder in Microsoft Dynamics CRM folder that is located at SystemDrive:\Program Files\Microsoft Dynamics CRM\client. If you can’t delete because a file is being used:

  • Open Windows -> Services -> Stop “SQL Server (CRM) On-Demand Shutdown”

Open registry keys editor: Windows + R -> type “regedit” and enter.

Note: You should take a backup before deleting the below folders.

In Registry Editor, delete all folders of “Microsoft Dynamics 365 for Microsoft Office Outlook” / “ MSCRMClient” from the following paths:

  • \HKEY_CURRENT_USER\Software\Microsoft\
  • \HKEY_LOCAL_MACHINE\Software\Microsoft\
  • \HKEY_USERS\.DEFAULT\Software\Microsoft\ (if present)

After that, let’s delete the Products Installed registry key. To do this, follow these steps

Locate and then earch the following registry subkey:

  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Installer\UserData\S-1-5-18\Products

Make sure, in above location check “Install Properties” and where you see the Display name as “Microsoft Dynamics 365 for Microsoft Office Outlook”

Delete that key folder.

  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
  • HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall

In both the above paths , locate the key where Display name is “Microsoft Dynamics 365 for Microsoft Office Outlook” and delete that key.

Once corrupt registries have been deleted, the uninstallation is basically completed.

Published by Adrian Nguyen

I'm currently working as a MS Dynamics 365 Support Engineer and this is also my first job post-graduating. I love helping people and always striving to be the second-best at any work I do.

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