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Mobile Active Sync problems Error 0x8501001

We have 8 mobile devices syncing with our Exchange 2007 server 7 work fine last weekend without any changes being made on one of the phones stopped syncing with Error 0x8501001
We've reset the phone and reconfigured the Exchange account on the phone also tried the account on a different phone with the same error, so its looking like server side anyone got any tips on resolving this?
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Tiva-IT
Asked:
Tiva-IT
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1 Solution
 
Tiva-ITAuthor Commented:
Added port 22675 on firewall and tested https://yourcompany.com/owa on mobile device certificate accepted OK still same error message on this one phone.
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MesthaCommented:
You shouldn't need to open any other ports, so close that additional port. This feature is designed to run through port 443.

When you browse to the site, do you get a certificate prompt? If you do then that is a hard failure.

Use a test account on the Microsoft test site:
https://testexchangeconnectivity.com/

Simon.
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Tiva-ITAuthor Commented:
443 is enabled - we are not using SSL for the moment
All the phones are configured the same only this one user account doesn't work on any phone so I'm quite sure its server side.
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MesthaCommented:
443 is SSL. You cannot use port 443 without using SSL.

Furthermore, trying to configure Exchange 2007 without SSL is not a good idea. The entire product is built around web services, and includes a self generated SSL certificate. However that self generated certificate is not supported for use with ActiveSync.

You should finish off the deployment of Exchange 2007 by changing the self generated certificate for a commercial certificate. You will have much less problems if you do that.

Simon.
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Tiva-ITAuthor Commented:
Thanks for that any ideas what could have happened to the one user account in Exchange?
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MesthaCommented:
Not really.
Single user account issues I do little troubleshooting with. Once it is shown to be a single account, if the problem doesn't jump out (ActiveSync disabled for example) then I just recreate the account.

Simon.
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Tiva-ITAuthor Commented:
Thats my last option as I'll have to backup the profile and emails and rebuild the account, this must be something straight forward on the Exchange server
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MesthaCommented:
Not necessarily. It could be something deep within the account configuration. If it was a server issue then it would be affecting all the users.

Simon.
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Tiva-ITAuthor Commented:
Sorry badly worded yes absolutly something to do with the account on Exchange 2k7
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MesthaCommented:
I presume that you have tried a different account on the same device? If that works then a replacement account created. I don't tend to delete old accounts, I prefer to move all content and then hide the old one and put a forward on it to the new account. That way nothing internal is lost when people reply to old emails.

Simon.
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Tiva-ITAuthor Commented:
Fixed it
Was a phone problem in the end.
Upgraded firmware on phone, activesync error changed to 0x80072f17 pointing to certificate problem, installed certificate on phone agreed to mobile policy and reset the time & data phone started syncing.
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