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exchange email not synching with mobile device on cellular

Hello- our Exchange 2010 has suddenly stopped pushing email out to iphones and ipads, there is no mail flow at all to these devices unless they are on company wireless network.  What are some things to look at?
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snyperj
Asked:
snyperj
1 Solution
 
Alan HardistyCommented:
If you visit https://testexchangeconnectivity.com - run the Activesync Autodiscover test and see what results you get.

Has anything changed on the server?

Did the firewall get rebooted but didn't have the config saved properly and port 443 is no longer open and forwarded?

Any server updates installed?

Any Exchange services stopped?

Have you run an iisreset?

Alan
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snyperjAuthor Commented:
Thanks, in the end we discovered there was a change to our external DNS provider.
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