Support for Dynamic '+' Email Aliases in Office 365
I am familiar with using a plus sign following my email alias to create dynamic unique addresses for a Gmail account. e.g. firstname.lastname@example.org will arrive at my Gmail mailbox, where I can then apply rules based on the 'To:' address. See this page for details: https://support.google.com/mail/answer/22370
I tested this on my Office 365 address and it works, but only for email addresses in my parent domain. Using the aliases on subdomain addresses results in a 'recipient not found' NDR.
Does anyone out there have more information on this feature or if it even is one for 365 / Exchange?
I’m pleased to announce that the plus addressing feature is now available for Exchange Admins to enable. This can be done through Powershell using the following command:
Set-OrganizationConfig -AllowPlusAddressInRecipients $true
For instructions on how to use Powershell, you can find out more here:
The setting may not instantly take effect so please expect a delay before you can start using plus addresses.
The Exchange Transport team
Nicholas Fiorentini commented
Is not working with DL.
Shahin Pirooz commented
Is PowerShell the only way to turn the feature on?
I've created a new request asking Microsoft to add plus email addressing for distribution lists as well. If you want this feature, please add your votes to https://office365.uservoice.com/forums/273493-office-365-admin/suggestions/41711161-enable-dynamic-plus-email-addresses-for-distribu.
Alex Bahret commented
This doesn't make any sense at all. The feature used to work with DLs on launch day. I have proof of it in my Inbox. I just now got a call from another tech that says it no longer works, and sure enough, it doesn't.
Why in the world would Microsoft disable this feature for DLs when it used to work? What the heck is going on?
I don't understand why you'd call this done. It's a month later, there's still no documentation on this new parameter, and it only works for mailboxes. We really need this to work for distribution lists.
Roberto Franco commented
Please enable it also for distribution lists, groups, etc.
Roberto Franco commented
I enabled the plus addresses on our 365 tenant but:
- writing from gmail to a plus address works fine
- writing to the same plus address from another 365 tenant doesn't work. The message never arrives and the sender doesn't even receive any NDR message.
This only works internally. We have had this enabled on exchange for several weeks now. When I send email to a + address from an email that's on the same exchange server, all is fine. When I send to the dynamic work address with an external address (outlook.com or gmail.com for example) it comes back with an Undeliverable failure message. How can this be fixed?
This is working against individual mailboxes. But not it seems against Office 365 groups or distibution lists? What?
@Bill: Plus addresses are only used for receiving messages.
@Hunter: There should be nothing else for you to do.
@Dustin and @Robert: Documentation is in the process of being published/updated
@V: There are no plans at this point to allow plus addresses for Exchange Server. If traffic is routed through Exchange Online to the Exchange Server, plus addressing will be supported.
Is this one way only? I get permission denied when sending with a + address. Receiving works fine. Also, this hasn't been enabled for very long, perhaps I need to wait?
Hi @Sean S, We have enabled this in our Tenant yesterday, confirmed that the AllowPlusAddressinRecipients is set to true but our messages are coming back as " Unknown To address ". Is their anything else we need to do to get this feature working?
Will there be any new documentation posted about this feature?
Is in future plan to add AllowPlusAddressInRecipients in Exchange?
Thanks for getting this feature out. It will be a big help for us.
As a follow-up, please update the commandlet documentation with this new parameter.
Activated before lunch, works now in the afternoon! Thanks, on to better things (renaming the tenant would be nice...)
Kévin LE QUILLEC commented
Same here, activated several hours ago, and it doesn't seem to work
The instructions are in the note from Sean S above
Enabled it several hours ago, not yet working
According to https://www.microsoft.com/en-us/microsoft-365/roadmap it is now "Launched". So it should be available for everyone...
Does somebody has any information on how to enable it?
"past few weeks", "wait a a few more weeks". It used to be "available to all by the end of August".
Please allow more beta testers, or give instruction how to enable plus addressing.