GPO For Microsoft Outlook not applying

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John Rutkowski

We wanted to make some Group Policy changes to Office that comes in the new VM library builds. Looking to change the Cache mode, the length of time and the location of the OST (To redirect to Azure Files so the user profiles are not being clogged up.

The GPO is not being applied, we have the current ADMX file for office. Anyone have issues with GPO not changing Outlook settings?

I even change the REG values manually and the changes were not applied.

Is there a special Azure ADMX template?

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DStephenson
(Edited )

Hey, John.

If you're setting the value in the registry and it's still not taking, I think there may be something else causing a conflict.
Have you tried creating a new user/profile/outlook profile to see if there's something residual that's taking precedence?

https://learn.microsoft.com/en-us/outlook/troubleshoot/data-files/cannot-change-the-location-of-ost-file#workaround-method-2---set-the-forceostpath-registry-entry-to-change-the-location-of-the-ost-file

 

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John Rutkowski

Tried other users & Profiles, It's as if there was some master setting prohibiting changes in the Outlook settings.

 

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Libis Bueno | Domitek

Hey John

Were you able to fix this issue? I had the same issue here is a link that can explain this better. 

Plan and configure Cached Exchange Mode in Outlook 2016 for Windows - Outlook | Microsoft Learn

Below is what I did to get this working.... 

Summary Notes: Issue: Not able to change Cache mode in Outlook

Cause: AVD default settings does not allow more than 1 month of cache emails

Resolution:
As of now, I have not been able to find any information on how to change Outlook profiles from cached mode (1 month retention) to online mode in the Outlook settings in AVD.

Below are the steps I took to configure the cache settings in Outlook 2016/365 running on AVD session for both Active Directory GPOs or local Group Policies (if does not have domain and applying it to golden image).

Note: Depending on the number of emails for the user, this will increase the amount of diskspace usage, which on AVD is set to 50GB

To use domain or local group policies, follow these steps:

  1. Download the following ADMX in your environment: https://www.microsoft.com/en-us/download/details.aspx?id=49030
  2. Extract the files
  3. Copy the outlk16.admx or all of the .admx files to %systemroot%\PolicyDefinitions\
  4. Select the En-US (based on your language) copy the outlk16.adml or all of the .adml files from the admx\en-us folder to the relative folder in %systemroot%\PolicyDefinitions\en-US
  5. Login to DC and Launch Group Policy Management or run gpdedit.msc if doing this on golden image
  6. Select GPO that will apply these settings. (Generally, we create a GPO name Domitek GPO)
  7. Go to User Configuration > Administrative Templates > Microsoft Outlook 2016 > Account Settings > Exchange > Cached Exchange Mode.
  8. Set “Use Cached Exchange Mode for new and existing Outlook profiles” to Disabled
  9. Login as the user and click Run and type: gpupdate /force wait for command to finish
  10. Log off and login again. Start Outlook and check Account settings
  11. You are not able to change the numbers of days files can be available offline. 


Hope this helps....

Thank you

Libis
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Dave Stephenson

Thanks, Libis Bueno | Domitek for going out of your way to share this! 🙂

I don't know if this will help John Rutkowski or not, but I can see this being a great resource for other partners facing the same issue.

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