How to remove [External] from Outlook emails, users are getting furious

Anonymous
2022-12-13T14:26:06+00:00

Since early December all of our Outlook365 users (in all tenants) have been getting the tag [External] in the subject line of their Outlook, and want it removed. I am only finding PS scripts which do not work. I have searched the settings and security areas of the admin console but have not found anything. Please help!

Outlook | Windows | Classic Outlook for Windows | For home

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  1. Anonymous
    2023-01-12T23:38:45+00:00

    do you mean: "It usually the dumbest users who request this type of warning"? Btw, there are contract-workers with a company email (a-, v-) who outlook still marks as "external" -- it makes it really hard to check email

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  2. Ron-6928 4,991 Reputation points
    2023-01-12T22:05:49+00:00

    No. This is server settings. Registry only affects client settings.

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  3. Anonymous
    2022-12-17T17:33:25+00:00

    Just to be clear, you are running the command at the Tenant level??

    Run on a test workstation (Powershell as admin)

    nstall-Module ExchangeOnlineManagement

    Import-Module ExchangeOnlineManagement

    Connect-ExchangeOnline -UserPrincipalName [USER@DOMAIN].com -ShowProgress $true

    Get-ExternalInOutlook

    Then rerun the command at the tenant level

    Set-ExternalInOutlook -Enabled $false

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  4. Anonymous
    2022-12-15T15:18:14+00:00

    Thanks for your reply Jim.

    I already evaluate this solution but I was not remove this label from messages header.

    But I found a solution.

    We can remove alert with your solution via Powershell and add a rule in Exchange Admin Center that add a disclamer in messages that match the required attributes as External or Internal sender etc.

    Below a link I found tha could be a workaround to bypass this problem

    https://www.techielass.com/enable-external-email-warning-tag-in-exchange-online/

    this is our test

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  5. Anonymous
    2022-12-13T17:27:20+00:00

    Dear Jim Bolinski (jim),

    Good day! Thank you for posting to Microsoft Community. We are happy to help you!

    In general, the internal/external subject of a message is defined by the source of the email, so I'd like to gather the following information from you to narrow down the issue:

    Are you sure that the messages you receive with external subjects are from internal users?

    All the messages you receive come with an external subject?

    If you are using the Outlook Desktop Client, try logging in to the OWA (Outlook web app) with your account and ask another user to send a test email, then check OWA to see if you get the same error as on the Outlook Desktop Client.

    Are all users inside your organization experiencing this issue?

    If you find some error messages or error codes, please share the screenshot with me so that I can do more research, thank you.

    Thanks in advance for your understanding! Your patience and cooperation will be highly appreciated. Hope you all the best!

    Sincerely,

    Kerry Chen | Microsoft Community Moderator

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