Sign in with Microsoft
Sign in or create an account.
Select a different account.
You have multiple accounts
Choose the account you want to sign in with.


This article describes the issues that are fixed in the Microsoft Outlook 2013 hotfix package that is dated October 14, 2014.


Issues that this hotfix package fixes

  • Assume that you connect Outlook 2013 to an Exchange Server 2013 server. Outlook creates additional connections to a shared mailbox for users who only have free/busy permissions of the calendar folder of the shared mailbox.

  • Outlook 2013 may crash randomly when you search items in Outlook Address Book. This issue occurs more frequently after a laptop resumes from hibernate.

  • It is not easy to find the Recover Deleted Items button in Outlook 2013.

    Note After you install this update, the Recover Deleted Items button is available on the Home tab when you select the Deleted Items folder.

  • Assume that you create a calendar item and save it as an .msg file. When you open the .msg file, you cannot add attachment to it.

  • When you sync a forwarded calendar item by using Exchange ActiveSync (EAS) protocol, the In-Reply-To field and the References field may be removed from the email headers.

  • Outlook 2013 may crash on exit.

  • Assume that you create a calendar item in a SharePoint Online calendar, and you set it as an all-day event, and then you export it as an iCalendar (.ics) file. When you import the .ics file into Outlook 2013, and then you change the Microsoft Windows time zone, the date or time value may be incorrect.

  • Outlook 2013 may try to download the OAB.xml from an external URL instead of from an internal URL. Additionally, Outlook may prompt you for your password.

  • Assume that you add a .pst file in your Outlook profile in Outlook 2013. And then you restart Outlook many times. When you expand the folder of the .pst file, you may receive an error message that does not contain helpful information.

  • Outlook items are indexed too frequently.

  • You cannot sign in by using smart card.

  • Fixes a dialog layout issue for both Japanese and Hebrew versions of Outlook 2013.

  • Outlook 2013 may prompt you for credentials on startup after you install a recent update for Outlook.

  • When you log on a large amount of Exchange accounts in Outlook 2013, Outlook may crash.

    Note After you install this update, follow the instructions in the registry information section to enable you to log on up to 370000 Exchange accounts.

  • Consider the following scenario:

    • You use Outlook 2013 in an environment in which the S/MIME encryption is enabled.

    • You start Outlook, and then you click Options on the File tab.

    • In the Outlook Options dialog box, you click Trust Center, click Trusted Center Settings, click E-mail Security, and then you select the check box for the Encrypt contents and attachments for outgoing messages option.

    • You right-click a file from Windows Explorer, select Send to, and then click Mail recipient.

    In this scenario, the Encrypt and Sign buttons are not enabled on the Options tab of the new email message.

  • Consider the following scenario:

    You try to add a new account in Outlook 2013 by using the following steps:

    1. You click File, click Add Account, enter your first email account, and then you click Next. Then, you cancel the credential prompt.

    2. You click the Back button in the Account Wizard, replace the email address by using your second email address, and then you click Next.

    In this scenario, the credential message displays your first email account instead of your second email address.

More Information

Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problems that are described in this article. Apply this hotfix only to systems that are experiencing the problems described in this article. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix Download Available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft website: The "Hotfix Download Available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.


To install this hotfix package, you must have Office 2013 installed.

Restart requirement

You do not have to restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

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.

After you install the hotfix package, follow these steps to enable you to log on up to 370000 Exchange accounts.

  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 UseLargeEMSInstCtxHeap, and then press Enter.

  6. In the Details pane, right-click UseLargeEMSInstCtxHeap, and then click Modify.

  7. In the Value data box, type 1, and then click OK.

  8. Exit Registry Editor.

File information

This hotfix may not contain all the files that you must have to fully update a product to the latest build. This hotfix contains only the files that you must have to resolve the issues that are listed in this article.

The global version of this hotfix package uses a Microsoft Windows Installer package to install the hotfix package. The dates and the times for these files are listed in Coordinated Universal Time (UTC) in the following table. When you view the file information, the date is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.

Need more help?

Want more options?

Explore subscription benefits, browse training courses, learn how to secure your device, and more.

Communities help you ask and answer questions, give feedback, and hear from experts with rich knowledge.

Was this information helpful?

What affected your experience?
By pressing submit, your feedback will be used to improve Microsoft products and services. Your IT admin will be able to collect this data. Privacy Statement.

Thank you for your feedback!