SBS 2011 and cloud based Exchange

We are in the process of moving one of clients off of an on premise Exchange server on SBS 2011 to a hosted exchange platform, we are having major problems with the Outlook clients constantly resetting to the previous on premise Exchange.
We have removed the autodiscover entry as detailed here and initially that seemed to work, are there any other group policy or similar entries we need to disable in order to resolve the issue. I've done a load of these recently with no issues but this is the first SBS2011 we have attempted.

Thanks in advance
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IvanSystem EngineerCommented:
Do you have DNS A Autodiscover record or _SRV record? Autodiscover will use them as well for autodiscover.

You are using Outlook 2013? SP1?

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niesmannAuthor Commented:
Found an Autodiscover dns record there is also a SBSConnectComputer record but can't see the _srv record.

Clients are Outlook 2010

Interestingly a couple of computers which were added manually to the domain are not having the issue and working fine its only the ones added by a previous Admin using the Wizard which appear to be causing the problem

Thanks for your prompt response
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