How to Check If Plus Addressing Is Enabled in Microsoft 365?

If you use Microsoft 365 (Exchange Online), here’s how you can check if plus addressing is active for your environment:

1. Open PowerShell and install the module 
Run the following command:

Install-Module ExchangeOnlineManagement -Scope CurrentUser

Then connect to Exchange Online:

Connect-ExchangeOnline -UserPrincipalName yourname@yourdomain.com

2. Check the setting:

Get-OrganizationConfig | Format-List DisablePlusAddressInRecipients

If the output is:

DisablePlusAddressInRecipients : False

You’re good — plus addressing is active!

If it says True, an Exchange Online admin can enable it with:

Set-OrganizationConfig -AllowPlusAddressInRecipients $true