We help IT Professionals succeed at work.
Get Started

Outlook resolving to old exchange server

355 Views
Last Modified: 2015-08-20
We migrated to Office 365 from our Exchange on-premise server yesterday. We are experiencing a problem with many PCs where, on the PC of a user for whom we are setting up an Outlook profile to connect to their Office 365 account, we have to change that PC's primary DNS server to point to a DNS server outside our facility or else the it will try and set their mail server to the old mailserver even though we've added all the DNS records that we added on the public DNS servers to our internal DNS server.

We are setting the PC's primary DNS server to 8.8.8.8, configuring their outlook profile, then setting their DNS back to DHCP. That seems to work for setting up the profile.

But, after a while, the server name on their email profile will change from something like this
8b97ea0e-56db-419a-923a-a54ce7d8a86d@whitewater.com, which is the correct thing, back to the old on-premise server SERVERMX2.relyonus.local

What am I missing? Why, despite our internal DNS records pointing to Office 365, is Outlook wanting to badly to resolve to the old mailserver instead of Office 365? Is this something in Active Directory?
Comment
Watch Question
CERTIFIED EXPERT
Most Valuable Expert 2015
Distinguished Expert 2020
Commented:
This problem has been solved!
Unlock 1 Answer and 4 Comments.
See Answer
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
Ask ANY Question

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

  • Troubleshooting
  • Research
  • Professional Opinions
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