Cannot access OWA URL or send Emails using Activesync when connected to Wifi network

Our Wifi network used to work fine when accessing our Exchange OWA URL or sending emails from devices that used ActiveSync connected to the Wifi. We can access all other websites fine and emails also work fine on 3G/4G and other wifi networks.

For some strange reason, this has now become a problem.

The only Wifi change that has happened recently is changing of the Wifi password but I don't see how that would affect access. I have already removed the Wifi network from devices and added it again. But this has not fixed the problem. We still cannot access the Exchange OWA URL nor send emails from devices.

Any ideas?

Devices connected to Wifi cannot access the Exchange URL?
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.

Can you resolve the host name you use for OWA/ActiveSync to the correct IP address?

Can you ping the IP address for OWA/ActiveSync (assuming there are no rules that block ICMP)?
DonKwizoteAuthor Commented:
Do you mean try pinging/resolving the external IP address?
From the Wifi network, if you issue the command "ping hostname", does it return the correct IP address and does it respond.
DonKwizoteAuthor Commented:
There was a weird rule in our firewall that was causing this. I disabled it and it worked. Thanks for your help

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
DonKwizoteAuthor Commented:
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

From novice to tech pro — start learning today.