Unwanted auto-discover message in Outlook - Office365

I am testing 5 users with Office 365. Rather than a complete switch to Exchange Online I have redirected emails from the current 1and1 mailboxes.

I have manually configured Outlook 2013 with the Office 365 settings and it has connected to the mailbox.

I am in the process of importing the old .pst files.

I am constantly getting a pop up message asking me if I want to allow a website to automatically configure the account. The URL is for 1and1. I have cancelled the warning but it continually keeps popping up.

Any advice?
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roy_battyDirectorAsked:
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Vasil Michev (MVP)Commented:
If the autodiscover record is still pointing at 1&1, that's the expected behavior. You can use the reg keys in this article to work around it: http://support.microsoft.com/kb/2212902

Note that disabling the autodiscover lookups will cause you trouble with configuring the profile (manual config is not really supported anymore), free/busy lookups, OOO replies, MailTips, etc, etc.
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roy_battyDirectorAuthor Commented:
So should I use the reg keys only as a temporary fix until I switch completely to Exchange Online and amend the auto discover record?
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Vasil Michev (MVP)Commented:
If you want to get rid of the periodic popups. But as mentioned above, then you will loose every autodsicover/EWS related functionality.
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roy_battyDirectorAuthor Commented:
I have just check the DNS record held with 1and1 and I do not see an auto-discover entry. Am I missing something here?
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roy_battyDirectorAuthor Commented:
Thanks Vasil
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