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MC524212 – (Updated) Excel is blocking untrusted XLL add-ins by default. (archived)

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check before: 2023-03-21

Product:

Microsoft 365 Apps

Platform:

Windows Desktop, World tenant

Status:

Launched

Change type:

New feature, Updated message, User impact

Links:

115485

Details:

Updated March 22, 2023: The Administrative Template files for Microsoft 365 Apps for enterprise has been updated to include a policy to control blocking Excel XLL Add-ins from untrusted locations.
The policy is located under Administrative Templates > Microsoft Excel 2016 > Excel Options > Security > Trust Center > Block Excel XLL Add-ins that come from an untrusted source.
The new Administrative Template files and details are available at Microsoft Download Center.
We are introducing a default change for Excel Windows desktop apps that run XLL add-ins: XLL add-ins from untrusted locations will now be blocked by default.

For XLL add-ins in files from untrusted locations, you will no longer be able to enable content with a click of a button. A message will appear notifying you of the risk and a link to get more information about possible workarounds and support. This change will help you stay more secure by blocking popular attack techniques.
This message is associated with Microsoft 365 Roadmap ID 115485
[When this will happen:]
Preview: We have already completed rolling out to Insiders preview.
Standard Release: We will begin rolling out early March and expect to complete by late March.

Change Category:
XXXXXXX ...

Scope:
XXXXXXX ...

Release Phase:
Current Channel

Created:
2023-03-07

updated:
2023-03-23

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changes*

DatePropertyoldnew
2023-03-23MC MessagesUpdated March 7, 2023: We have updated the content below for clairty. Thank you for your patience.
We are introducing a default change for Excel Windows desktop apps that run XLL add-ins: XLL add-ins from untrusted locations will now be blocked by default.

For XLL add-ins in files from untrusted locations, you will no longer be able to enable content with a click of a button. A message will appear notifying you of the risk and a link to get more information about possible workarounds and support. This change will help you stay more secure by blocking popular attack techniques.
This message is associated with Microsoft 365 Roadmap ID 115485
[When this will happen:]
Preview: We have already completed rolling out to Insiders preview.
Standard Release: We will begin rolling out early March 2023 and expect to complete by late March 2023.
Updated March 22, 2023: The Administrative Template files for Microsoft 365 Apps for enterprise has been updated to include a policy to control blocking Excel XLL Add-ins from untrusted locations.
The policy is located under Administrative Templates > Microsoft Excel 2016 > Excel Options > Security > Trust Center > Block Excel XLL Add-ins that come from an untrusted source.
The new Administrative Template files and details are available at Microsoft Download Center.
We are introducing a default change for Excel Windows desktop apps that run XLL add-ins: XLL add-ins from untrusted locations will now be blocked by default.

For XLL add-ins in files from untrusted locations, you will no longer be able to enable content with a click of a button. A message will appear notifying you of the risk and a link to get more information about possible workarounds and support. This change will help you stay more secure by blocking popular attack techniques.
This message is associated with Microsoft 365 Roadmap ID 115485
[When this will happen:]
Preview: We have already completed rolling out to Insiders preview.
Standard Release: We will begin rolling out early March and expect to complete by late March.
2023-03-23MC Last Updated03/07/2023 22:17:202023-03-23T04:31:13Z
2023-03-23MC prepareIf your organization uses any Excel XLL add-ins, follow the steps provided in our support article to ensure those add-ins are coming from a trusted location.
Excel is blocking untrusted XLL add-ins by default
https://support.microsoft.com/topic/excel-is-blocking-untrusted-xll-add-ins-by-default-1e3752e2-1177-4444-a807-7b700266a6fb
https://www.microsoft.com/microsoft-365/roadmap?filters=&searchterms=115485
If your organization uses any Excel XLL add-ins, follow the steps provided in our support article to ensure those add-ins are coming from a trusted location.
Excel is blocking untrusted XLL add-ins by default
https://support.microsoft.com/topic/excel-is-blocking-untrusted-xll-add-ins-by-default-1e3752e2-1177-4444-a807-7b700266a6fb
https://www.microsoft.com/en-us/download/details.aspx?id=49030
https://www.microsoft.com/microsoft-365/roadmap?filters=&searchterms=115485
2023-03-08MC MessagesWe are introducing a default change for Excel Windows desktop apps that run XLL add-ins: XLL add-ins from untrusted locations will now be blocked by default.
For XLL add-ins in files from untrusted locations, you will no longer be able to enable content with a click of a button. A message will appear notifying you of the risk and a link to get more information about possible workarounds and support. This change will help you stay more secure by blocking popular attack techniques.
This message is associated with Microsoft 365 Roadmap ID 115485
[When this will happen:]
Preview: We have already completed rolling out to Insiders preview.
Standard Release: We will begin rolling out early March and expect to complete by late March.
Updated March 7, 2023: We have updated the content below for clairty. Thank you for your patience.
We are introducing a default change for Excel Windows desktop apps that run XLL add-ins: XLL add-ins from untrusted locations will now be blocked by default.

For XLL add-ins in files from untrusted locations, you will no longer be able to enable content with a click of a button. A message will appear notifying you of the risk and a link to get more information about possible workarounds and support. This change will help you stay more secure by blocking popular attack techniques.
This message is associated with Microsoft 365 Roadmap ID 115485
[When this will happen:]
Preview: We have already completed rolling out to Insiders preview.
Standard Release: We will begin rolling out early March 2023 and expect to complete by late March 2023.
2023-03-08MC TitleExcel is blocking untrusted XLL add-ins by default.(Updated) Excel is blocking untrusted XLL add-ins by default.
2023-03-08MC Last Updated03/07/2023 02:13:572023-03-07T22:17:20Z
2023-03-08MC MessageTagNamesNew feature, User impactUpdated message, New feature, User impact
2023-03-08MC prepareIf your organization uses any Excel XLL add-ins, follow the steps provided in our support article to ensure those add-ins are coming from a trusted location.
https://www.microsoft.com/microsoft-365/roadmap?filters=&searchterms=115485
If your organization uses any Excel XLL add-ins, follow the steps provided in our support article to ensure those add-ins are coming from a trusted location.
Excel is blocking untrusted XLL add-ins by default
https://support.microsoft.com/topic/excel-is-blocking-untrusted-xll-add-ins-by-default-1e3752e2-1177-4444-a807-7b700266a6fb
https://www.microsoft.com/microsoft-365/roadmap?filters=&searchterms=115485

*starting April 2022

Last updated 10 months ago

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