Outlook forwarding rule stopped working

A rule was created six months ago to forward mail from one specific sender to two recipients. Suddenly I'm getting an "undeliverable" error message: 

Remote Server returned '550 5.7.520 Access denied, Your organization does not allow external forwarding. Please contact your administrator for further assistance. AS(7555)'

How may I reinstate this rule or workaround it? I'm the administrator of my account. 

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Hi MLK_MLK,

Thank you for choosing Microsoft forum.

Based on your description, I've done some research. According to Configuring external email forwarding in Office 365, "Office 365 doesn't allow automatic external forwarding by either Inbox rules or mail box configuration, which provides a secure default policy. However, the admin can modify these settings for all, or some, users in the organization.“ And, ”Disabling automatic forwarding to external addresses in Office 365 is being rolled out in phases with details communicated via Message Center posts.“ Therefore, would you please contact your Exchange admin to have a check of the outbound anti-spam policy?

Hope this helps! Thank you.

Sincerely,

Qian

* Beware of scammers posting fake support numbers here.

* Kindly Mark and Vote this reply if it helps please, as it will be beneficial to more Community members reading here.

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Thank you. As I said in my original post, I am the admin of my account. I don't know how to modify the settings you describe. Kindly advise. 

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didn't help me either

typical msft non helpful many worded gibberish

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Here is the guidance the Outlook In App Team is using.  Sharing this in case it might help.

This customer may be having an issues with blocking or unblocking email forwarding in M365, for tenants the related Message Center notification is: MC223357

To enable or disable email forwarding for a specific mailbox, see https://docs.microsoft.com/en-us/microsoft-365/admin/email/configure-email-forwarding?view=o365-worldwide

If you are getting the following error: “550 5.7.520 Access denied, Your organization does not allow external forwarding”, please make sure the policy is configured to enable External Auto-forward - https://docs.microsoft.com/en-us/microsoft-365/security/office-365-security/external-email-forwarding?view=o365-worldwide

On the tenant level, control of external forwarding is done using the outbound spam policy. You can check the outbound spam filter policy from Security and Compliance Center or by using the Get-HostedOutboundSpamFilterPolicy command.

Note: It is recommended to keep the External Autoforward disabled on your default outbound spam filter policy and enable it only for the users who need external forwarding by creating a custom policy for those users. You can read more in https://docs.microsoft.com/en-us/microsoft-365/security/office-365-security/configure-the-outbound-spam-policy?view=o365-worldwide

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Why don't you speak simple English? This answer has too much technobabble in it to pick out something useful.

Try saying, "Yes, we changed it on purpose to frustrate any gmail users.  Google blocks Outlook so now we're even! Hahaha!
So now you have to go here (link) and change this setting (screenshot). 
We apologize for breaking millions of users' email and will never do it again without advance warning. Shame on us."

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Here is the PowerShell script that I created. Must be used by an Exchange Admin:

# https://answers.microsoft.com/en-us/msoffice/forum/msoffice_outlook-mso_other-mso_o365b/outlook-forwarding-rule-stopped-working/d6199018-5e44-4b5b-8f17-2287c0138804

# https://docs.microsoft.com/en-us/powershell/module/exchange/set-remotedomain

Install-Module ExchangeOnlineManagement
Import-Module ExchangeOnlineManagement
Connect-ExchangeOnline

New-RemoteDomain -DomainName [myDesiredDestination].com -Name myDestination1
Set-RemoteDomain myDestination1 -AutoForwardEnabled $true -DeliveryReportEnabled $false -NDREnabled $true -CharacterSet UTF-8 -NonMimeCharacterSet UTF-8 -TNEFEnabled $false

# …

# check in: https://admin.exchange.microsoft.com/#/remotedomains

Cheers.

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Additionally needed:

New-HostedOutboundSpamFilterPolicy -Name "Allow forwarding" -AutoForwardingMode On -RecipientLimitExternalPerHour 30 -RecipientLimitPerDay 50

New-HostedOutboundSpamFilterRule -Name "Allow forwarding" -HostedOutboundSpamFilterPolicy "Allow forwarding" -From [*** Email address is removed for privacy ***]

# check in: https://protection.office.com/antispam

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Ok, this set myself as a spammer for one day (only incoming emails) :-).
So remove the 30/50 mail count limits or set them to a few thousand.

In combination with the bug that I (as a global Exchange admin) was not listed in https://protection.office.com/restrictedusers and even a Microsoft support ticket did not help I had to wait till today and re-send my yesterday afternoon's mails :-).

At least I was informed by mail :-):

A medium-severity alert has been triggered

Email sending limit exceeded 

Severity: Medium 

Time: 11/10/2020 12:15:00 PM (UTC) 

Activity: Email sending limit exceeded 

User: [...] 

Details: User [...] has sent 8 internal and 41 external recipients in the last day and was attempting to send to an additional 2 recipients, which would have exceeded their Daily limit.

Last message 650...2a5. 

   [View alert details]

Thank you, 

The Office 365 Team 

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This is a joke. Seriously, you have to run PowerShell to fix a common business mechanism for forwarding emails to a non-corporate domain?!? You can give an admin GUI answer? This is insane, Microsoft. You broke our vital support ticket email flow and are causing huge damage to our business.

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Here is real more simple solution to this problem:

https://office365itpros.com/2020/11/12/microsoft-clamps-down-mail-forwarding-exchange-online/

To whomever, is the PM for this product decision. Extremely bad call. Buring this in your relentless steam of Office 365 updates is TERRIBLE. This is a basic email function utilized for hundreds of scenarios.

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Last updated July 1, 2021 Views 4,132 Applies to: