MC221113 – (Updated) Final Reminder: Office 365 ATP External email forwarding controls and policy change (archived)

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check before: 2020-09-04

Product:

Advanced Threat Protection - Office 365, Exchange

Scope:

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Platform:

Online, World tenant

Links:

63831
(MC218984)
(MC223357)

Details:

Updated September 15, 2020: As announced in latest update to MC221113, additional time was needed to complete validations before deploying change and enforcing the Auto Forward Policy. We have completed all validations and will resume deployment of this policy on September 16, 2020. As a reminder the Auto-Forwarding Policy will be enforced for tenants who have configured their policy to "On" or "Off". For tenants that have made no changes and have no users externally forwarding prior to September 15, 2020 the setting ?Automatic? will default to ?Off? and automatic forwarding will be disabled. For organizations that have some users externally forwarding prior to September 15, 2020 the setting ?Automatic? will default to ?On? and we will contact you separately when this will change for your tenant. Note: If you have configured your Auto Forward policy to ?Off? at this time externally forwarded mail will not be blocked. Updated September 8, 2020: As announced in MC221113 (August 28th), on September 1st, 2020 the Auto-Forwarding Policy was planned be enforced for tenants who have configured their policy to "On" or "Off", this includes tenants that had users external forwarding prior to September 1st 2020. We have determined that we need additional time to complete validations before we can deploy this change and enforce the policy action. Once we have completed the additional validations, we will send an updated message center post confirming when the policy will be enforced. Original message below for reference. As originally announced in MC218984 (July '20) automated external email forwarding is a tactic attackers use to exfiltrate data out of an organization. To counter that, we are updating our outbound anti-spam policies. First, we are providing a control to easily enable automatic external forwarding for select people in your organization. Second, we will change the ?Automatic? setting to block automatic external forwarding. Internal automatic forwarding of messages will not be impacted by this change. On September 1st, 2020 the Auto-Forwarding Policy will be enforced for tenants who have configured their policy to "On" or "Off". For tenants that have made no changes and have no users externally forwarding prior to September 1st 2020 the setting ?Automatic? will default to ?Off? and automatic forwarding will be disabled. For organizations that have some users externally forwarding prior to September 1st 2020 the setting ?Automatic? will default to ?On? and we will contact you separately when this will change for your tenant. NOTE: No action is needed if you don't want to allow any users to automatically forward messages externally or if no one in your tenant is currently doing so. Additionally, we understand that some organizations already have users automatically forwarding messages outside the organization and we will provide additional time and communications to enable transition to the new policy controls. For these organizations we will communicate via Message center with more details on when the change will impact your specific tenant. Key points Microsoft 365 https://www.microsoft.com/microsoft-365/roadmap?filters=searchterms=63831 Roadmap ID 63831 Timing: TBD Roll-out: tenant level Control type: admin control Action: review and assess by August 28, 2020

Change Category:
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Status:
In development

Ring:
General Availability

Created:
2020-08-29

updated:
2020-09-19

Change type:
Admin impact, Feature update, New feature, Updated message, User impact

task type:
Action Plan For Change

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