Summary

I had a customer ask how to turn on the external tag for emails. I wanted to get this documented and show you how easy it is to do.

Steps

Here are the steps to turn on External tagging in email:

1. Install-Module ExchangeOnlineManagement
2. Import-Module ExchangeOnlineManagement
3. Connect-ExchangeOnline -UserPrincipalName '[email protected]'
4. Set-ExternalInOutlook -Enabled $true

Note: Please remember you will need access in EXO to do this.

References

• Set-ExternalInOutlook (ExchangePowerShell) | Microsoft Learn
• Connect to Exchange Online Protection PowerShell | Microsoft Learn