Disable Auto Complete in Click to Run Outlook using Group Policy or MS Endpoint (Intune)

Question

Hello All,

I have been asked to completely disable the auto complete / suggestions facility in Outlook using Click to Run Office and either Group Policy or Microsoft Endpoint Manager (Intune).

I know that a user can manually turn this off in settings however I have been asked to turn it off for all 1800 users across out network using either group policy or microsoft endpoint.

I have tried using the following registry keys:

HKCU\software\policies\microsoft\office\16.0\outlook\preferences\showautosug Value=0

HKCU\Software\Microsoft\Office\16.0\Outlook\Preferences\ShowAutoSug Value=0

However these have no effect. We are using the 64bit version of Office Click to Run (Microsoft 365 MSO (Version 2109 Build 16.0.14430.20314) 64-bit ). I have hunted everywhere and cannot seem to find an automated way that can achieve this?

Any help much appreciated.

Thanks

Answer 1

Hi @Richard ,

Welcome to our forum!

Do you mean that registry keys doesn’t work or you can't apply this registry key to 1800 users?

Based on my test on Outlook 365 client, I can disable the option successfully by registry or GPO. How did you apply the registry? Please refer to the below figure and check if there're any differences with yours:

After that, the option is greyed out as shown in the below.

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Answer 2

People try this. It worked for me!

https://community.spiceworks.com/topic/2471304-cannot-disable-auto-complete-in-office-365-outlook-client

HKCU\SOFTWARE\Microsoft\Office\Outlook\Settings\Data\ global_Mail_SendAutoSug

And the bit in the string that needs to be changed is: "value":"true"  >  "value":"false"

{"name":"Mail_SendAutoSug","itemClass":"","id":"","scope":"global","parentSetting":"","secondaryKey":"","status":"SYNCEDTOSERVICE","type":"Bool","timestamp":0,"metadata":"","value":"true","isFirstSync":"false","source":"UserOverride"}