Open Software Solutions

Source: Microsoft Support

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Microsoft Outlook AutoDiscover will not Configure Outlook for the Microsoft Online Environment. It will revert back to the on-premise Microsoft Exchange 2007 Server and email will not be able to be viewed through the Microsoft Outlook client.

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If your company is an Exchange Online customer and your e-mail environment meets the following conditions, you may encounter Autodiscover issues.

1.       Your organization is using Microsoft Exchange Server 2007.

2.       Your users are using Microsoft Outlook 2007.

3.       Your users with Exchange Online mailboxes also have mailboxes on your on-premise Exchange Server, AND your Exchange Online user accounts have identical primary SMTP e-mail address in both systems.Description

Autodiscover is a feature of Exchange 2007 that automatically connects your Outlook 2007 clients with the correct Exchange e-mail server without requiring the users to enter any Outlook configuration information.

The Autodiscover feature keys off of the user’s primary SMTP address. For example, jim@contoso.com. If there is an SMTP address conflict, if the user’s computer is joined to an on-premise Active Directory domain, the connection to the on-premise Exchange Server will receive the highest priority.

This situation is most likely to occur during the trial period or during an e-mail coexistence period before the users mailbox is fully migrated to the Exchange Online environment, and the on-premise mailbox is deleted.Recommendations

1.       Do not allow users with mailboxes on both systems. Delete the on-premise Exchange mailbox as quickly as possible after migrating mailbox content to Exchange Online.

2.       Do not use the same primary SMTP address for Microsoft Online user accounts and on-premise Exchange mailboxes during the trial period.

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If you must have both mailboxes in use at the same time, and if you must use the same primary SMTP address for both mailboxes, use the following work-around:

1. Install Outlook 2007 SP1.

2. Install the Outlook 2007 hotfix (/Feedback.aspx?kbNumber=948716) described in KB KB948716.

3. Modify the registry on each client computer:

To modify the registry:

1.       Click Start, click Run, and then type regedit.

2.       Navigate to the following registry key:
HKEY_CURRENT_USER Software Microsoft Office 12.0 Outlook AutoDiscover

3.       Set the following values for the Value Names listed below:
PreferLocalXML=dword:1
ExcludeHttpRedirect=dword:0
ExcludeHttpsAutodiscoverDomain=dword:1
ExcludeHttpsRootDomain=dword:1
ExcludeScpLookup=dword:1
ExcludeSrvLookup=dword:1
ExcludeSrvRecord=dword:1

If you contact Microsoft Online Support (http://technet.microsoft.com/en-us/library/cc268319(TechNet.10).aspx), they can provide a .REG file to simplify this operation.How to Access Your E-Mail

After on-premise Exchange Server mailboxes have been migrated to Exchange Online, the Outlook 2007 client will always connect to Exchange Online. If your on-premise mailboxes have not been deleted, you can use Microsoft Outlook Web Access to connect to your on-premise mailbox.How to Reverse the Work Around

After deleting the on-premise Exchange Server mailbox, or if the user no longer has an Exchange Online mailbox, you should return the registry key to its original settings.

To modify the registry:

1.       Click Start, click Run, and then type regedit.

2.       Navigate to the following registry key: HKEY_CURRENT_USER Software Microsoft Office 12.0 Outlook AutoDiscover

3.       Set the following values on the Value Names listed below:
PreferLocalXML=dword:0
ExcludeHttpRedirect=dword:0
ExcludeHttpsAutodiscoverDomain=dword:0
ExcludeHttpsRootDomain=dword:0
ExcludeScpLookup=dword:0
ExcludeSrvLookup=dword:0
ExcludeSrvRecord=dword:0

If you contact Microsoft Online Support (http://technet.microsoft.com/en-us/library/cc268319(TechNet.10).aspx), they can provide a .REG file to simplify this operation.

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