setup Outlook rule with "have server reply using a specific message" failed to reply to external recipients

I am using Office 365 Exchange online and Outlook.
I am trying to auto reply to anyone who send a message to my mailbox, when I setup Outlook rule with "have server reply using a specific message", it only reply to internal users, but failed to reply to external recipients.
Gene HeAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Ryan ChongBusiness Systems Analyst , ex-Senior Application EngineerCommented:
just thinking it's not an Outlook issue...

was wondering  if those emails are still in outbox and could not be sent out to external recipients?
Mal OsborneAlpha GeekCommented:
This is a configurable permission in Exchange, pretty sure it is not allowed by default.
Mal OsborneAlpha GeekCommented:
More in the link below. Unsure if you can do this outside of Powershell for Office 365, however Powershell will definitely let you set this.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Seth SimmonsSr. Systems AdministratorCommented:
No comment has been added to this question in more than 21 days, so it is now classified as abandoned.

I have recommended this question be closed as follows:

Accept: Mal Osborne (https:#a42411402)

If you feel this question should be closed differently, post an objection and the moderators will review all objections and close it as they feel fit. If no one objects, this question will be closed automatically the way described above.

Experts-Exchange Cleanup Volunteer
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Microsoft Office

From novice to tech pro — start learning today.