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
    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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  2. Anonymous
    2022-12-17T02:28:40+00:00

    Also having the same issue across every tenant we manage.

    "externalinoutlook" was set to false the first moments that this appeared which is now more than a week ago and no changes to a single tenant has occurred yet.

    adding domains to the exclusion works even though its disabled.

    Every single client has requested this be disabled as its damn ugly in the implementation of it.

    Am all ears how to get O365 to respect the setting when its set to false.

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  3. 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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  4. Anonymous
    2022-12-15T14:50:04+00:00

    This is great for sysadmins! Now if only us users had the option of turning it off without asking our sysadmin!

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  5. Anonymous
    2022-12-15T13:54:31+00:00

    We have found a solution to remove the annoying [External] tag in the subject line

    Run at the tenant level the command:

    Set-ExternalInOutlook -Enabled $false

    It takes about 24 hours to take effect, and only remove the annoying tag from the new emails, but at least we have 154 users off our back now.

    That was about the most ridiculous "feature" ever added. It breaks the ability to track conversations, and is just annoying to the users. 95% of all emails is external anyway, why would tagging it make any difference.

    Hope this helps some other sysadmins that have users upset at them

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