iPhones stopped connecting to Echange via 3g
We have about 20 iPhones in the company and yesterday all of them stopped connecting to Exchange via 3G. (Although they will still connect via wireless if the SSL is turned off.) The Windows Mobile phones continue to work properly. We have Exchange Enterprise 2003 on Windows 2003 Standard Servers with a front-end, back-end configuration. So OWA sits on the front-end server and that's the address used when configuring email on phones. I've checked with our firewall guy and nothing was changed there. I've made no changes to the Exchange servers. AT&T and Apple deny any changes from their ends, any ideas? We've never had any problems with this connection.
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I wish it was that simple. The cert is good. It was renewed about a month ago. But I just checked so I could confirm that to you. The odd this is that the situation only affects the iPhones, the Windows Mobile phones are fine. I will check for updates, although I didn't do any manually and the server is set not to update on it's own. Will check the article noted above.
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Totally agree on the iPhone thing. It's wierd. I've downloaded your article -- amazing, great info -- and am looking at the virutal dir config etc. I may be missing it, but I don't see if this info relates to a front-end exchange server, a back-end or both. Should I be making these changes to the front-end (OWA) or the back-end (mailboxes)? Thanks.
The article is aimed at single-server environments as this is where I have my skill-set, so not exactly sure how much will be relevant, but hopefully a fair percentage will ; )
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The certificate when I look at it says it's fine and it's been installed for several weeks without problem, but the results of the Windows version of activesync says it cannot verify it. So I'm going to check with the issuer. The cert details say it is fine too............... Also we have just discovered that the phones with the problems are 3G, and the 3Gs's are fine.
Perhaps an Upgrade is in order on the 3G phones via iTunes?
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While I still don't know why this happened...I have found a workaround. While on the phone with Apple (who was going to charge $700 for enterprise support) I decided to try something I figured wouldn't work -- but what the heck, I tried everything else. I entered the MX IP in the server field... Voila...mail flows to iPhones again. Wierd. Thank you for all the help, your FAQ sheet will be very handy in the near future when we setup new Exchange servers.
That suggests a DNS issue causing you problems.
What has changed in DNS?
Glad you like my article : )
What has changed in DNS?
Glad you like my article : )
Have you checked any certificates haven't expired?
Have any exchange updates been applied recently?
Those are the first place I would look.