--- title: Resolving issues with MDMigrator and versions of Outlook installed using Click-to-Run description: Versions of Outlook installed using Mircosoft's Click-to-Run delivery mechanism will experience issues using MDMigrator to migrate data from Exchange to MDaemon. This article will address this issue. --- [Skip to content](https://knowledge.mdaemon.com/mdmigrator-outlook-click-to-run#main-content) [![](https://knowledge.mdaemon.com/hs-fs/hubfs/MDaemon-Technologies_logo.png?width=200&height=150&name=MDaemon-Technologies_logo.png)](https://mdaemon.com/) - [Knowledge Base Home](https://knowledge.mdaemon.com/) - [Go to www.mdaemon.com](https://mdaemon.com/) Open main navigation Close main navigation - [Knowledge Base Home](https://knowledge.mdaemon.com/) - [Go to www.mdaemon.com](https://mdaemon.com/) - [Contact Us](https://mdaemon.com/pages/contact-us) [Contact Us](https://mdaemon.com/pages/contact-us) Knowledge Base - There are no suggestions because the search field is empty. 1. [Knowledge Base Home](https://knowledge.mdaemon.com/?hsLang=en) 2. [MDaemon Email Server](https://knowledge.mdaemon.com/mdaemon-email-server?hsLang=en) # Resolving issues with MDMigrator and versions of Outlook installed using Click-to-Run ## Versions of Outlook installed using Mircosoft's Click-to-Run delivery mechanism will experience issues using MDMigrator to migrate data from Exchange to MDaemon. This article will address this issue. If MDMigrator is ran with a version of Outlook installed using Click-to-Run, the following error will be logged for every message. **Unable to export message, unable to create IConverterSession instance in WriteMimeMessage().** To check if Outlook was installed using Click-to-Run, verify if the **VirtualOutlook** key exists in one of the Windows registry location below. **HKEY\_LOCAL\_MACHINE\\Software\\Microsoft\\Office\\15.0\\Common\\InstallRoot\\Virtual** **HKEY\_LOCAL\_MACHINE\\SOFTWARE\\Microsoft\\Office\\16.0\\Common\\InstallRoot\\Virtual** If the **VirtualOutlook** key exists, the registry will need to be modified in order to use MDMigrator and the Click-to-Run version of Outlook.  **Proceed with caution!** Making changes to the Windows registry can be dangerous and steps should be taken to protect and/or restore the server and/or configuration. Making a backup of the registry is strongly recommended at the very least.  A backup of the computer is recommended to restore in the event of a failure.  Registry keys will need to be copied to a new location to work around this issue. **The source location of the registry keys can vary depending on the version of Outlook installed.** In this example, a Windows 64-bit operating system is installed with a 64-bit version of Outlook 2019 installed using Click-to-Run.  The registry entries can be moved manually or using the two lines of PowerShell below. **Copy-Item "HKLM:\\SOFTWARE\\Microsoft\\Office\\ClickToRun\\REGISTRY\\MACHINE\\Software\\Classes\\CLSID\\{4E3A7680-B77A-11D0-9DA5-00C04FD65685}" "HKLM:\\SOFTWARE\\Classes\\CLSID\\{4E3A7680-B77A-11D0-9DA5-00C04FD65685}" -Recurse** **Copy-Item "HKLM:\\SOFTWARE\\Microsoft\\Office\\ClickToRun\\REGISTRY\\MACHINE\\Software\\Classes\\CLSID\\{9EADBD1A-447B-4240-A9DD-73FE7C53A981}" "HKLM:\\SOFTWARE\\Classes\\CLSID\\{9EADBD1A-447B-4240-A9DD-73FE7C53A981}" -Recurse**  Others may find it easier to open regedit.exe application and export the content from the following two locations: **HKEY\_LOCAL\_MACHINE\\SOFTWARE\\Microsoft\\Office\\ClickToRun\\REGISTRY\\MACHINE\\Software\\Classes\\CLSID\\{4E3A7680-B77A-11D0-9DA5-00C04FD65685}** **HKEY\_LOCAL\_MACHINE\\SOFTWARE\\Microsoft\\Office\\ClickToRun\\REGISTRY\\MACHINE\\Software\\Classes\\CLSID\\{9EADBD1A-447B-4240-A9DD-73FE7C53A981}** **![win\_reg\_export](https://knowledge.mdaemon.com/hs-fs/hubfs/KBAs/win_reg_export.png?width=688&height=435&name=win_reg_export.png)** Edit the exported .reg file for HKEY\_LOCAL\_MACHINE\\SOFTWARE\\Classes\\CLSID\\{4E3A7680-B77A-11D0-9DA5-00C04FD65685} using Notepad and change the paths from the original: **Windows Registry Editor Version 5.00** **\[HKEY\_LOCAL\_MACHINE\\SOFTWARE\\Microsoft\\Office\\ClickToRun\\REGISTRY\\MACHINE\\Software\\Classes\\CLSID\\{4E3A7680-B77A-11D0-9DA5-00C04FD65685}\]** **@="CLSID\_IConverterSession"** **\[HKEY\_LOCAL\_MACHINE\\SOFTWARE\\Microsoft\\Office\\ClickToRun\\REGISTRY\\MACHINE\\Software\\Classes\\CLSID\\{4E3A7680-B77A-11D0-9DA5-00C04FD65685}\\InprocServer32\]** **@="C:\\\\Program Files\\\\Microsoft Office\\\\root\\\\Office16\\\\OUTLMIME.DLL"** **"ThreadingModel"="Both"** To the following: **Windows Registry Editor Version 5.00** **\[HKEY\_LOCAL\_MACHINE\\SOFTWARE\\Classes\\CLSID\\{4E3A7680-B77A-11D0-9DA5-00C04FD65685}\]** **@="CLSID\_IConverterSession"** **\[HKEY\_LOCAL\_MACHINE\\SOFTWARE\\Classes\\CLSID\\{4E3A7680-B77A-11D0-9DA5-00C04FD65685}\\InprocServer32\]** **@="C:\\\\Program Files\\\\Microsoft Office\\\\root\\\\Office16\\\\OUTLMIME.DLL"** **"ThreadingModel"="Both"** Save the modified .reg file.   Next, edit the exported .reg file for the **HKEY\_LOCAL\_MACHINE\\SOFTWARE\\Classes\\CLSID\\{4E3A7680-B77A-11D0-9DA5-00C04FD65685}** registry entry and change the paths to the following: **HKEY\_LOCAL\_MACHINE\\SOFTWARE\\Classes\\CLSID\\{9EADBD1A-447B-4240-A9DD-73FE7C53A981}** Save the second modified .reg file. 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