Exchange users able to connect intermittently

I have about 35-40 users running on a Small Business Server running exchange. This morning we started getting issues with users connecting to Exchange. Some would connect just fine, others would not even attempt to connect. Some OWA access was possible, some wasn't. Then, if a user who was able to connect via Outlook closed outlook, then reopened, they couldn't connect. It's all very spotty right now.
I should mention that the server is at a remote COLO faciltiy on the other side of the city.

Things I've done.

1. Licensing, 37/45
2. OWA is accesible no problem from within the Server, no issues.
3. Server Reboot
...all among other things.


Any insight?


microsymplexAsked:
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.

MikealclCommented:
Perhaps you have a bad primary DNS server and its correcting itself using the secondary?
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
jar3817Commented:
How is your connectivity to this colo? Getting any packet loss?
0
microsymplexAuthor Commented:
We got it figured out last night. Our ISP's DNS servers must have had an issue, and they reloaded an old database with our clients OLD IP address for the server. (It was an IP they had used a year ago) So depending on what DNS servers the clients were using, that was what determined whether or not they connected. We also got on the trail of DNS when you could go http://IP/exchange rather than http://server/exchange.
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
Microsoft Server OS

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.