April 14, 2015 update for Outlook 2013 (KB2965270)

Applies to: Microsoft Office 2013 Service Pack 1Outlook 2013Office Home and Student 2013 RT

This article describes update KB2965270 for Microsoft Outlook 2013 that was released on April 14, 2015. This update also applies to Office Home and Student 2013 RT, which contains Outlook 2013. This update has a prerequisite.

Please be aware that the update in Download Center applies to Microsoft Installer (.msi)-based edition of Office 2013. It does not apply to the Office 2013 Click-to-Run editions such as Microsoft Office 365 Home. (How to determine?).

Improvements and Fixes

  • Improves translations of Skype for Business in multiple languages for Outlook 2013.
  • Improves translations in the POP/IMAP account setup wizard.
  • Improves translations of various error messages in Dutch in Outlook 2013.
  • Fixes the following issues:
    • When you search some items in Outlook 2013, the performance responses slowly.
    • When you try to empty the Deleted Items folder or move items that are just moved in Outlook 2013, you may receive one of the following error messages:
      • Outlook is synchronizing local changes made to items in this folder. You cannot remove this folder until the synchronization with the server is complete.
      • Cannot delete this folder. Right-click the folder, and then click properties to check your permissions for the folder. See the folder owner or your administrator to change your permissions. Outlook is synchronizing local changes made to items in this folder. You cannot remove this folder until the synchronization with the server is complete.
      These issues occur when Outlook 2013 is in Cached Exchange Mode, and the Empty Deleted Items folders when exiting Outlook option is enabled.
    • Public folders, online archived mailboxes, or shared mailboxes may disappear from the folder list in Outlook 2013.
    • When you log on to a computer in a domain that contains roaming profiles, you are still prompted for passwords in Outlook 2013. This issue occurs because the persistence of the saved account credential is Local Machine but not Enterprise.
    • When you open an email message that is saved in the .eml (MIME) format in Outlook 2013, the recipients in the Cc field are not displayed.
    • A MailTip message is still displayed in the default locale in Outlook 2013 even though the MailTip message is localized to different locales. For example, a MailTip message is still displayed in English on a computer in which the region is set to a non-English locale.
    • When you move some folders from your primary mailbox to an additional mailbox that has the full access permission in hybrid mode in Outlook 2013, the operation fails unexpectedly.
    • Fixes an issue for EAS accounts in which email messages that are moved, deleted, or flagged as junk are duplicated.
    • When you run spelling check for an email message in Outlook 2013, Outlook 2013 may crash.
    • Assume that you configure an Outlook account that connects to several mailboxes by using different protocols (some connections use RPC over HTTP and other connections use MAPI over HTTP) in Outlook 2013. When you start Outlook 2013, you are prompted for two credential requirements.

      Note To resolve this issue, follow the steps in the "Registry Information" section after you apply the update.

Update information

Registry Information

Follow the steps in this section carefully. Serious problems might occur if you modify the registry incorrectly. Before you modify it, back up the registry for restoration in case problems occur.

  1. Exit all Microsoft Office applications.
  2. Start Registry Editor:
    • In Windows 7, click Start, type regedit in the Search programs and files text box, and then click regedit.exe in the search results.
    • In Windows 8, move your mouse to the upper-right corner, click Search, type regedit in the search text box, and then click regedit.exe in the search results.
  3. Locate and then select the following registry subkey:
  4. On the Edit menu, point to New, and then click DWORD Value.
  5. Type DisableSharingUsernamePasswordBetweenMsoAndOutlookStacks, and then press the Enter key.
  6. In the Details pane, right-click DisableSharingUsernamePasswordBetweenMsoAndOutlookStacks, and then click Modify.
  7. In the Value data box, type 1, and then click OK.
  8. Exit Registry Editor.

Restart information

You may have to restart the computer after you install this update.


To apply this update, you must have Microsoft Office 2013 Service Pack 1 installed.

More Information

How to determine whether my Office installation is Click-to-Run or MSI-based:
  1. Start Outlook 2013.
  2. On the File menu, click Account.
  3. For Office 2013 Click-to-Run installations, an Update Options item is displayed. For MSI-based installations, the Update Options item is not displayed.
Office 2013 Click-to-Run installationMSI-based Office 2013
The screenshot for Outlook Click to Run The screenshot for Outlook MSI


See the information about the standard terminology that is used to describe Microsoft software updates. The Office System TechCenter contains the latest administrative updates and strategic deployment resources for all versions of Office.