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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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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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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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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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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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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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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.<br />
<br />
I have manually configured Outlook 2013 with the Office 365 settings and it has connected to the mailbox. <br />
<br />
I am in the process of importing the old .pst files.<br />
<br />
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.<br />
<br />
Any advice?
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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?

Unwanted auto-discover message in Outlook - Office365

Office 365 is a group of software plus services subscriptions that provides productivity software and related services to its subscribers. Office 365 allows the use of Microsoft Office apps on Windows and OS X, provides storage space on Microsoft's cloud storage service OneDrive, and grants 60 Skype minutes per month. Office 365 includes e-mail and social networking services through hosted versions of Exchange Server, Skype for Business Server, SharePoint and Office Online, integration with Yammer, as well as access to the Office software. All of Office 365's components can be managed and configured through an online portal; users can be added manually, imported from a CSV file, or Office 365 can be set up for single sign-on with a local Active Directory using Active Directory Federation Services.

Microsoft 365

Microsoft Outlook is a personal information manager from Microsoft, available as a part of the Microsoft Office suite. Although often used mainly as an email application, it also includes a calendar, task manager, contact manager, note-taker, journal, and web browser.