Hybrid Office 365 Exchange 2010 Outlook 2007

Hi experts, we have Hybrid setup with Office 365 and Exchange 2010 on premise. On moving mailboxes to Office 365, Outlook 2007 profile keeps prompting for password. If I setup a manual profile then it works no issues. With the existing profile if I go in and change authentication to Anonymous then it connects

However that is not acceptable we need the existing 2007 profile to prompt once for email address and password and then connect to Office 365. The existing Outlook profile correctly shows email server as Office 365 with Proxy connection also correctly populated only thing preventing change seems to be Authentication

how can this be fixed? Outlook 2007 SP3 for all clients are upto date with patches.

Also I need to change internal and external URI to point to autodiscover.outlook.com. How to do this?

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.

Vasil Michev (MVP)Commented:
Outlook 2007 needs the latest updates AND the Office 365 desktop setup tool to work correctly with Exchange Online. You should really move to a newer version, it's not supported anymore and Microsoft can decide to block it at any point.
abhijitm00Author Commented:
Thanks. How do I resolve this issue though? Do you have commands to change internal and external URI for autodiscover?
Vasil Michev (MVP)Commented:
You dont need to mess with the URIs, all you need configured for Autodiscover in relation to O365 is the CNAME DNS record.
Big Business Goals? Which KPIs Will Help You

The most successful MSPs rely on metrics – known as key performance indicators (KPIs) – for making informed decisions that help their businesses thrive, rather than just survive. This eBook provides an overview of the most important KPIs used by top MSPs.

abhijitm00Author Commented:
Thanks so autodiscover should address authentication issue for Outlook 2007 as well correct?
Vasil Michev (MVP)Commented:
Not exactly, as noted above 2007 needs special treatment. At the very least, you need to run the desktop setup tool from the Office 365 portal.

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
abhijitm00Author Commented:
Thanks for the assistance we were able to install needed updates using WSUS, SP3 and installing external and internal Autodiscover URIs
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
Office 365

From novice to tech pro — start learning today.