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Microsoft Office Click-to-Run isn’t a new Microsoft Office “product”. Instead, it is a new way of delivering and updating the Office programs you are already familiar with. To learn more about Click-To-Run, please see Office 2010 Click-to-Run: Introduction.

If you are affected by a known issue listed below that is specific to Click-to-Run for Office 2010, please see Click-to-Run: Switch to using an MSI-based Office 2010 edition to learn more about available options.


  • Many add-ins might not function as expected when used with Click-to-Run. You might see error messages stating that an add-in failed to load or couldn’t be found.

  • Some Microsoft SharePoint functionality targeted at business or enterprise users won’t be available, for example:

    • The Edit in Datasheet feature isn’t available. This functionality is provided by Microsoft Access, which is not part of Click-to-Run. Even if Access is installed separately, the Edit in Datasheet feature still isn’t available.

    • The SharePoint Picture Library is unavailable.

    • The PowerPoint Slide Library is unavailable.

  • Business Connectivity Services (BCS) in SharePoint doesn’t support Office programs installed or updated using Click-to-Run.

  • After installing a Microsoft Office Language Pack, you can’t change Help for a program to display in the language of the Language Pack. Help always remains in the language of the Click-to-Run product.

  • Sending email from third-party applications might not work as expected. You might receive an error message saying that a default email client isn’t available.


  • When running the Click-to-Run edition of Microsoft Outlook side-by-side with an older version of Outlook, you might experience reduced or unexpected functionality. To avoid these issues, we recommend you only run one version of Outlook and remove all other versions.

  • Search functionality in Outlook is only fully functional for Click-to-Run editions of Outlook. Search is still available, but with reduced functionality for older versions of Outlook.

  • You might notice performance issues when alternating between the Click-to-Run edition of Outlook and other versions of Outlook.

  • Many third-party Office add-ins won’t work properly with Outlook, for example:

    • iTunes Calendar Helper    You won’t be able to sync Outlook Calendar events via iTunes to your portable device.

    • Google Search Toolbar    Search functionality provided by Google Search Toolbar won’t be available.

  • Microsoft Office Communicator isn’t fully integrated with Outlook. You might not be able to send an email to a contact or perform other tasks from Office Communicator that depend on Outlook.

  • Windows Mobile Device Center or ActiveSync doesn’t detect Outlook as installed. You can’t sync Outlook content, such as Mail, Contacts, or Calendar items, to a mobile device when using Click-to-Run.

  • When running the Click-to-Run edition of Outlook, the Indexing Options dialog box in Windows doesn’t allow you to choose specific Outlook stores for indexing. Click-to-Run is a new deployment technology that isolates Office programs from the computer. Because Outlook is isolated from the rest of the computer, search in Windows cannot expose individual Outlook stores to you.


  • The Send to OneNote command in Internet Explorer isn’t available.

  • Third-party OneNote add-ins don’t function with OneNote. Because of the add-in model for OneNote, add-ins aren’t available when using Click-to-Run.

  • The Send to OneNote printer isn’t available with OneNote 2010 running on Windows XP. When using OneNote on Windows XP, you might use an alternate method to import content, such as screen capture or clipboard.

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