

String Value: DefaultAssociationsConfiguration HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\System

Note The XML will be based on the defaults set for the user account used when running DISM Once the defaults are set, use DISM to export these values to XMLĭism /Online /Export-DefaultAppAssociations:"F:\AppAssociations.xml".For MailTo, click Choose default apps by protocol then find MAILTO in the list.Manually configure Default Apps in Windows Settings on your source PC.Instead, you must use an XML-based group policy to define the set of default apps. Since Windows uses a hash to protect this new registry location, you cannot simply edit the values stored in that path. HKEY_CURRENT_USER\Software\Microsoft\Windows\Shell\Associations\URLAssociations\MAILTO\UserChoice

The default application for the MailTo protocol is now stored here: However, the above method does not work in Windows 8 and Windows 10. HKEY_CLASSES_ROOT\mailto\shell\open\command Otherwise, this can result in calls to the help desk.īefore Windows 8, you could control the handling of the MailTo protocol by deploying a single registry value or group policy, thus setting outlook.exe to Default: This post focuses on one specific configuration option that you can set by default: configuring Windows clients to use Outlook as the default MailTo email program.Īlthough individual users can manually set this option in Windows Settings | Choose a default app for each protocol, this assumes that the user is familiar with the setting. If you are an administrator and are responsible for the deployment and maintenance of Microsoft Office in your organization, it is almost certain that at some time you have been asked to customize Microsoft Outlook.
