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iPhone & Exchange account verification failure

I have two iphones, both running version 4.0.2.
When setting up an exchange account with identical settings one connects and verifies fine and I can use email fine.
The other allows me to enter the email address, domain, username and password, whch it verifies without error. Upon entering the mail server information, it fails verification (account verification failure).
So I have deduced that the SBS 2003 server has been set up fine, and there must be some setting on the iphone causing the issue.
I have tried resetting the network settings,  deselecting sync options with mail/calendars etc in Itunes.

The only difference between phones is that the owner did have a faulty phone, and this was a replacement and Itunes was used to populate the new iphone with backed up date from the old phone.

What should I try next??
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gorrie67
Asked:
gorrie67
1 Solution
 
Mkris9Commented:
have you tried removing the exchange acccount from the phone and adding it again ?
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gorrie67Author Commented:
Yes on numerous occasions.
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tyruzCommented:
Is SSL enabled on both profiles of the phones? If not, and your server does not support valid SSL authentication, this could be the cause. Try to connect with SSL disanled to determine if this could be the problem.
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gorrie67Author Commented:
SSL is enabled on both phones.
I have tried with and without SSL without any success.
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MrN1c3Commented:
Are you able to access other 3G services on the problematic phone?
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sunnyc7Commented:
Go here
www.mxtoolbox.com
Check the first mx record

Are you entering that in servername ?
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theonlyallanCommented:
I have seen there are times when the Backup file from iTunes might have transferred corrupted settings. Especially when the backup file was created with a significantly lower version.. ie: 3.0 restoring onto 4.0.2

Suggestions:

-Try First: Goto: Settings > General > Reset All Settings.. Then Delete the Exchange account in the iPhone and start all over again?
-Since you are using exchange, Start from Scratch? Restore your iPhone.  Connect iPhone to iTunes and hit Restore. Do Not Load and Backup, and enter all settings manually. Exchange will sync your Calendars and Contacts wirelessly. Make sure you backup the Pictures and Bookmarks.

Good Luck!
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delmcCommented:
Have you tried installing the SBS certificate on the phone, I have came across this problem numerous times and always had to import the certificcate onto the phone. To do this you need to setup a third party email account and send the certificate to it, extract the certificate on the iphone and then attempt the sync. Also may be worthwhile using the microsoft exchange connectivity analyzer found at https://www.testexchangeconnectivity.com/#&&/wEXAQUBcwUBM6hsZ7Mm/gYiLf3f68Q6JkwLY9BI, as this will test for any errors within the activesync topology.
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sunnyc7Commented:
Can you run CEICW (Configure Internet and E-mail and Internet Connection wizard) and check if OMA is allowed on SBS ?

thanks
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gorrie67Author Commented:
Sorry for the delay.. I am just waiting to get the iphone back of user!
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gorrie67Author Commented:
Got the phone back!

MrN1c3:  - No  I get access denied when browsing web.
Contacted the service provider and a bar had been put on Internet browsing.
Once this was removed all worked fine.

Thanks for all you help.
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