This article describes update 4018296 for Microsoft Outlook 2016 that was released on March 6, 2018. This update has a prerequisite.

Be aware that the update on the Microsoft Download Center applies to the Microsoft Installer (.msi)-based edition of Office 2016. It doesn't apply to the Office 2016 Click-to-Run editions, such as Microsoft Office 365 Home. (How to determine?)

Improvements and fixes

This update fixes the following issues:

  • When Outlook starts Exchange ActiveSync (EAS) Autodiscover process, it never tries to do an anonymous HTTP request. Instead, it tries to do BASIC authentication by using an account without password at the first time.

    Note To fix this issue, you have to set the value of the registry key EnableEASAccountCreation to disable the EAS Autodiscover feature after you install this update. See KB4018306 for more information.

  • Assume that you have KB3178664 installed and opened an Excel Worksheet already. When you try to open FreeDoc Excel Worksheets from a public folder in Outlook 2016, you receive the following error message:

    Outlook cannot track the program used to open this document. Any changes you make to the document will not be saved to the original document.

  • Outlook may fail to use the secondary Exchange Web Service (EWS) URL that's specified by the Exchange Administrator if the primary URL doesn't work.

  • You cannot copy and paste an SMTP address that's from an external recipient to the To, Cc and Bcc lines of a new message in Outlook 2016.

  • When you add a non-specification-compliant RSS feed to Outlook 2016, Outlook 2016 crashes. This issue occurs when one of the RSS feeds contains empty element if the RSS or an ATOM feed does not have a field that's required by their format specification.

  • When you set up some email accounts in Outlook 2016, Outlook may crash if the Exchange Autodiscover settings aren't available.

This update also improves the translation of string “99+” for the Japanese version of Office 2016 to make sure that the meaning is correct.

How to download and install the update

Microsoft Update

Use Microsoft Update to automatically download and install the update.

Download Center

This update is available for manual download and installation from the Microsoft Download Center.

If you're not sure which platform (32-bit or 64-bit) you're running, see Am I running 32-bit or 64-bit Office? Additionally, see more information about how to download Microsoft support files.

Microsoft scanned this file for viruses by using the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to it.

Update information

Prerequisites

To apply this update, you must have Microsoft Outlook 2016 installed.

Restart information

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

More information

To determine whether your Office installation is Click-to-Run or MSI-based, follow these steps:

  1. Start an Office 2016 application.

  2. On the File menu, select Account.

  3. For Office 2016 Click-to-Run installations, an Update Options item is displayed. For MSI-based installations, the Update Options item isn't displayed.

Office 2016 Click-to-Run installation

MSI-based Office 2016

The screenshot for Word click to run

The screenshot for Word MSI

How to uninstall this update

Windows 10

  1. Go to Start, enter View Installed Updates in the Search Windows box, and then press Enter.

  2. In the list of updates, locate and select update KB4018296, and then select Uninstall.

Windows 8 and Windows 8.1

  1. Swipe in from the right edge of the screen, and then select Search. If you're using a mouse, point to the lower-right corner of the screen, and then select Search.

  2. Enter windows update, select Windows Update, and then select Installed Updates.

  3. In the list of updates, locate and select update KB4018296, and then select Uninstall.

Windows 7

  1. Go to Start, enter Run, and then select Run.

  2. Enter Appwiz.cpl, and then select OK.

  3. Select View installed updates.

  4. In the list of updates, locate and select update KB4018296, and then select Uninstall.

References

Learn about the standard terminology that's used to describe Microsoft software updates.

The Office System TechCenter contains the latest administrative updates and strategic deployment resources for all versions of Office.

File information

x86

outlook-x-none.msp file information

File identifier

File name

File version

File size

Date

Time

Contab32.dll

Contab32.dll

16.0.4666.1000

153,312

14-Feb-2018

07:32

Dlgsetp.dll

Dlgsetp.dll

16.0.4666.1000

109,776

14-Feb-2018

07:32

Envelope.dll

Envelope.dll

16.0.4666.1000

189,688

14-Feb-2018

07:32

Mapiph.dll

Mapiph.dll

16.0.4666.1000

332,080

14-Feb-2018

07:32

Mapir.dll_1033

Mapir.dll

16.0.4666.1000

1,280,712

14-Feb-2018

07:41

Mimedir.dll

Mimedir.dll

16.0.4666.1000

446,120

14-Feb-2018

07:32

Olmapi32.dll

Olmapi32.dll

16.0.4666.1000

4,792,040

14-Feb-2018

07:32

Omsmain.dll

Omsmain.dll

16.0.4654.1000

753,392

13-Feb-2018

02:56

Omsxp32.dll

Omsxp32.dll

16.0.4630.1000

261,400

13-Feb-2018

02:56

Outllibr.dll_1033

Outllibr.dll

16.0.4666.1000

7,495,888

14-Feb-2018

07:41

Outlmime.dll

Outlmime.dll

16.0.4666.1000

611,584

14-Feb-2018

07:32

Outlook.exe

Outlook.exe

16.0.4666.1000

23,209,136

14-Feb-2018

07:32

Outlook.hol_1033

Outlook.hol

Not applicable

1,335,562

13-Feb-2018

02:55

Outlph.dll

Outlph.dll

16.0.4666.1000

358,168

14-Feb-2018

07:32

Outlvba.dll

Outlvba.dll

16.0.4666.1000

76,512

14-Feb-2018

07:32

Pstprx32.dll

Pstprx32.dll

16.0.4666.1000

1,396,416

14-Feb-2018

07:32

Rm.dll

Rm.dll

16.0.4666.1000

90,816

14-Feb-2018

07:32

Scnpst32.dll

Scnpst32.dll

16.0.4666.1000

460,616

14-Feb-2018

07:32

Scnpst64.dll

Scnpst64.dll

16.0.4666.1000

472,400

14-Feb-2018

07:32

Scnpst64c.dll

Scnpst64c.dll

16.0.4666.1000

673,632

14-Feb-2018

07:32

x64

outlook-x-none.msp file information

File identifier

File name

File version

File size

Date

Time

Contab32.dll

Contab32.dll

16.0.4666.1000

201,440

14-Feb-2018

07:36

Dlgsetp.dll

Dlgsetp.dll

16.0.4666.1000

138,448

14-Feb-2018

07:36

Envelope.dll

Envelope.dll

16.0.4666.1000

249,080

14-Feb-2018

07:36

Mapiph.dll

Mapiph.dll

16.0.4666.1000

481,064

14-Feb-2018

07:36

Mapir.dll_1033

Mapir.dll

16.0.4666.1000

1,280,712

14-Feb-2018

07:45

Mimedir.dll

Mimedir.dll

16.0.4666.1000

601,256

14-Feb-2018

07:36

Olappt.fae

Olappt.fae

16.0.4366.1000

134,480

13-Feb-2018

03:01

Olmapi32.dll

Olmapi32.dll

16.0.4666.1000

6,626,024

14-Feb-2018

07:36

Omsmain.dll

Omsmain.dll

16.0.4630.1000

1,004,264

13-Feb-2018

03:01

Omsxp32.dll

Omsxp32.dll

16.0.4660.1000

352,024

13-Feb-2018

03:01

Outllibr.dll_1033

Outllibr.dll

16.0.4666.1000

7,495,888

14-Feb-2018

07:45

Outlmime.dll

Outlmime.dll

16.0.4666.1000

783,616

14-Feb-2018

07:36

Outlook.exe

Outlook.exe

16.0.4666.1000

35,034,288

14-Feb-2018

07:36

Outlook.hol_1033

Outlook.hol

Not applicable

1,335,562

13-Feb-2018

03:00

Outlph.dll

Outlph.dll

16.0.4666.1000

429,336

14-Feb-2018

07:36

Outlvba.dll

Outlvba.dll

16.0.4666.1000

96,992

14-Feb-2018

07:36

Pstprx32.dll

Pstprx32.dll

16.0.4666.1000

2,583,744

14-Feb-2018

07:36

Rm.dll

Rm.dll

16.0.4666.1000

110,784

14-Feb-2018

07:36

Scnpst32.dll

Scnpst32.dll

16.0.4666.1000

610,632

14-Feb-2018

07:36

Scnpst64.dll

Scnpst64.dll

16.0.4666.1000

614,224

14-Feb-2018

07:36

Scnpst64c.dll

Scnpst64c.dll

16.0.4666.1000

814,424

14-Feb-2018

07:36

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