We help IT Professionals succeed at work.

Office 365 Exchange Online / On-Premise hybrid configuration: Mailbox user missing on on-premise exchange server.

76 Views
Last Modified: 2019-01-31
Office 365 Exchange Online / On-Premise hybrid configuration: Mailbox user missing on on-premise exchange server.

I have a couple of Office 365 accounts that were setup within active directory that do not appear in our exchange 2013 server. My guess is the accounts were created in Active directory Users and Computers, then the e-mail addresses were manually assigned to the user objects attribute "proxyAddresses". Then the accounts were synced using the DirSync / Azure Connect sync utility and the accounts were then registered with Office 365. However our on-premise exchange 2013 server does not list the Mailbox users. This is starting to cause problems with users that were setup this way. For example, we have a couple of devices that send messages directly to the on-premise server, which is routed to the mailbox within Office 365. The on-premise exchange server is unable to route the message because the server doesn't know the mailbox user exists. I found a couple of articles that direct me to make a few changes within the attribute editor. But either the settings do not work or the user account within Office 365 is moved to the deleted users. Any suggestions on how I can enable my on-premise exchange server to recognize the mailbox users?
Comment
Watch Question

MaheshArchitect
CERTIFIED EXPERT
Distinguished Expert 2019

Commented:
when you have exchange 2013 server, what is point in manually adding Proxyaddress attribute to AD users ?

Its defeating purpose of onpremise exchange

For new users You should enable / create "O365 mailbox" with onpremise exchange, then only it can be listed as mailbox with onpremsie exchange, it is nothing but MEU with mailbox hosted in O365
Systems Administrator II
Commented:
This one is on us!
(Get your first solution completely free - no credit card required)
UNLOCK SOLUTION

Gain unlimited access to on-demand training courses with an Experts Exchange subscription.

Get Access
Why Experts Exchange?

Experts Exchange always has the answer, or at the least points me in the correct direction! It is like having another employee that is extremely experienced.

Jim Murphy
Programmer at Smart IT Solutions

When asked, what has been your best career decision?

Deciding to stick with EE.

Mohamed Asif
Technical Department Head

Being involved with EE helped me to grow personally and professionally.

Carl Webster
CTP, Sr Infrastructure Consultant
Empower Your Career
Did You Know?

We've partnered with two important charities to provide clean water and computer science education to those who need it most. READ MORE

Ask ANY Question

Connect with Certified Experts to gain insight and support on specific technology challenges including:

  • Troubleshooting
  • Research
  • Professional Opinions
Unlock the solution to this question.
Join our community and discover your potential

Experts Exchange is the only place where you can interact directly with leading experts in the technology field. Become a member today and access the collective knowledge of thousands of technology experts.

*This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

OR

Please enter a first name

Please enter a last name

8+ characters (letters, numbers, and a symbol)

By clicking, you agree to the Terms of Use and Privacy Policy.