Salesforce email relay to Office 365

I am hoping to get this setup without having to setup an internal IIS SMTP server.  Does anyone know the procedure for getting this setup correctly?

Currently when sending email from salesforce it is sent on behalf of the user.  All users have Office 365 mailbox.  I have configured a connector in Office 365 which allows it to work when sending email to company users but when sending to external it fails.
MinotAsked:
Who is Participating?
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.

FOXActive Directory/Exchange EngineerCommented:
In your office 365 admin center you have to create CONTACTS for your external users with their email addresses.  Once done you will be able to send to those contacts.
0
MinotAuthor Commented:
Is there any other way besides creating contacts?  We are talking potentially thousands of contacts.  Thanks
0
FOXActive Directory/Exchange EngineerCommented:
Did you test with one external email set up as a contact in O365 to verify if that worked? You can do a bulk import of the contacts into o365 with powershell and a .csv file.
0
Ultimate Tool Kit for Technology Solution Provider

Broken down into practical pointers and step-by-step instructions, the IT Service Excellence Tool Kit delivers expert advice for technology solution providers. Get your free copy now.

FOXActive Directory/Exchange EngineerCommented:
0
MinotAuthor Commented:
Not sure what fixed this.  I had originally followed these instructions and it did not work for external users.  I went back a few weeks later and re-enabled relay without changing anything else and it worked.  So the below link may be correct.  Thanks for the help.

https://www.cirrusinsight.com/blog/setting-up-email-relay-for-salesforce-with-office-365
0

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
MinotAuthor Commented:
The link provided was the answer.
0
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
Salesforce

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.