BMD: New Outlook

1. New Outlook

Microsoft is going to gradually introduce the new Outlook to all Microsoft 365 plans in the upcoming months and years. Here, you can find more information on the migration:

New Outlook: Migration stages | Microsoft Learn

If you use the new Outlook together with BMD applications, you will no longer be able to use the following features, as the new Outlook does not support the required COM interface.

1.1. Which features are affected?

Archiving emails via the BMD Outlook add-in
Processing email attachments in FIAC programs via the BMD Outlook add-in
Sending emails in the foreground from BMD NTCS DMS
Drag and drop from the new Outlook to BMD NTCS DMS

1.2. Who is affected?

Customers with Microsoft 365 business plans (as of 6 January 2025) and Microsoft 365 Enterprise (as of April 2026)

1.3. Who is not affected?

Neither BMD Cloud customers nor customers who have a local installation of Outlook (Office 2016/2019/2021/2024, Home and Business) are affected (as per January 2025).

Note: Folgende only use the following settings after consulting your administrator or IT manager.

1.4. I am a user of Microsoft 365. What can I do if my Outlook has already been migrated?

If your Outlook has already been migrated to the new version, you can set the switch in the new Outlook for Windows to "Off":

Then, define Outlook (not "Outlook (New)") as the default program.

Here, you can find instructions: https://support.microsoft.com/en-us/office/make-outlook-the-default-program-for-email-contacts-and-calendar-ff7990c4-54c4-4390-8fe3-c0285226f02 1

2. Prevent automatic migrationDetailansicht Technik

We want to point out once more that if you carry out the following steps, this has to be done on your own responsibility and ideally after consulting your IT manager.

To prevent automatic migration to the new Outlook, you can set the Registry keys listed below. The following things will be changed:

Automatic migration to new Outlook will be deactivated.
Automatic opening of new Outlook on start-up of Outlook will be deactivated.
Further automatic migration will be deactivated.
The button "Try the new Outlook" will be hidden.

2.1. Instructions for usersDetailansicht Technik

If you are a user and want to change the settings yourself, you have to set the following values in the Registry. You can do this e.g. by creating a file for importing the entries below.

Instructions:

You can already download the prepared file here or create it yourself by following the steps described below:

Outlooknew.reg (Please unpack the ZIP file and import the file with a double click.)

If you want to create the file yourself, please follow the steps below:

Close all programs (applications)
Open the editor (Notepad)
Copy the following text to the editor:

Windows Registry Editor Version 5.00

; Deactivate automatic migration to new Outlook. (https://learn.microsoft.com/en-us/microsoft-365-apps/outlook/get-started/control-install)
[HKEY_CURRENT_USER\Software\Microsoft\office\16.0\Outlook\Preferences]
"NewOutlookMigrationUserSetting"=dword:00000000

; Deactivate information on migrating to new Outlook. (https://learn.microsoft.com/en-us/microsoft-365-apps/outlook/manage/admin-controlled-migration-policy)
[HKEY_CURRENT_USER\Software\Microsoft\office\16.0\Outlook\Options\General]
"DoNewOutlookAutoMigration"=dword:00000000

; Deactivate automatic opening of new Outlook when starting Outlook. (https://support.microsoft.com/en-us/office/toggle-out-of-the-new-outlook-for-windows-preview-ec102b39-5727-418e-ae1f-a1805434640c)
[HKEY_CURRENT_USER\Software\Microsoft\office\16.0\Outlook\Preferences]
"UseNewOutlook"=dword:00000000

; Adjust interval control between migration attempts. (https://learn.microsoft.com/en-us/microsoft-365-apps/outlook/manage/admin-controlled-migration-policy)
[HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\Options\General]
"NewOutlookAutoMigrationRetryIntervals"=dword:00000000

; Hide the switch "Try new Outlook". (https://learn.microsoft.com/en-us/exchange/clients-and-mobile-in-exchange-online/outlook-on-the-web/enable-disable-employee-access-new-outlook)
[HKEY_CURRENT_USER\Software\Microsoft\office\16.0\Outlook\Options\General]
"HideNewOutlookToggle"=dword:00000001

Click on "Save as" in the editor and select "All files (*.*)" as the file type.
Save the file e.g. as "Outlooknew.reg" (for example on the Desktop).

Then, execute the file with a double click. Afterwards, the entries should have been applied to the Registry.

2.2. Instructions for administratorsDetailansicht Technik

In order to deactivate the new Outlook, you have to distribute the following Registry entries by GPO (group policy).

Policy for deactivating automatic migration to the new Outlook

(https://learn.microsoft.com/en-us/microsoft-365-apps/outlook/get-started/control-install):
[HKEY_CURRENT_USER\Software\Policies\Microsoft\office\16.0\Outlook\Preferences]
"NewOutlookMigrationUserSetting"=dword:00000000

Further policy for deactivating information on migrating to new Outlook

(https://learn.microsoft.com/en-us/microsoft-365-apps/outlook/manage/admin-controlled-migration-policy):
[HKEY_CURRENT_USER\Software\Policies\Microsoft\office\16.0\Outlook\Options\General]
"DoNewOutlookAutoMigration"=dword:00000000

Policy for deactivating automatic opening of the new Outlook on start-up of Outlook

(https://support.microsoft.com/en-us/office/toggle-out-of-the-new-outlook-for-windows-preview-ec102b39-5727-418e-ae1f-a1805434640c):
[HKEY_CURRENT_USER\Software\Policies\Microsoft\office\16.0\Outlook\Preferences]
"UseNewOutlook"=dword:00000000

Policy for adjusting interval control between migration attempts

(https://learn.microsoft.com/en-us/microsoft-365-apps/outlook/manage/admin-controlled-migration-policy):
[HKEY_CURRENT_USER\SOFTWARE\Policies\Microsoft\Office\16.0\Outlook\Options\General]
"NewOutlookAutoMigrationRetryIntervals"=dword:00000000

Policy for hiding the switch "Try new Outlook"

(https://learn.microsoft.com/en-us/exchange/clients-and-mobile-in-exchange-online/outlook-on-the-web/enable-disable-employee-access-new-outlook):
[HKEY_CURRENT_USER\Software\Policies\Microsoft\office\16.0\Outlook\Options\General]
"HideNewOutlookToggle"=dword:00000001

Section:

General technical documentation

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