This article describes update 4484212 for Microsoft Outlook 2016 that was released on January 7, 2020.

Be aware that the update in 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 (see What version of Office am I using?).

Improvements and fixes

This update contains the following fixes:

  • When an email message that has a signed email message as an attachment is also signed, Outlook breaks the digital signature of the attached message.

  • Memory leaks occur when toast notifications are enabled.

  • When the display size is scaled to more than 100 percent in Windows 10, mailbox elements are not displayed correctly in the additional mailboxes list box on the Advanced tab in Microsoft Exchange dialog box. Additionally, it is difficult to recognize them.

  • When the weather service isn't available, Outlook doesn't stop making service calls after it receives an HTTP 404 error. This causes a heavy network load.

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.

Virus-scan claim

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 Office 2016 installed.

Restart information

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

More information

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 KB4484212, 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 KB4484212, 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 KB4484212, and then select Uninstall.

File information

The English (United States) version of this software update installs files that have the attributes that are listed in the following tables. The dates and times for these files are listed in Coordinated Universal Time (UTC). The dates and times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and times may change when you perform certain operations on the files.

x64

outlook-x-none.msp file information

File identifier

File name

File version

File size

Date

Time

Contab32.dll

Contab32.dll

16.0.4945.1000

205,144

17-Dec-2019

04:34

Dlgsetp.dll

Dlgsetp.dll

16.0.4945.1000

141,344

17-Dec-2019

04:34

Envelope.dll

Envelope.dll

16.0.4951.1000

250,728

17-Dec-2019

04:34

Mapiph.dll

Mapiph.dll

16.0.4849.1000

481,488

17-Dec-2019

04:34

Mapir.dll_1033

Mapir.dll

16.0.4723.1000

1,280,744

17-Dec-2019

04:33

Mimedir.dll

Mimedir.dll

16.0.4951.1000

605,992

17-Dec-2019

04:34

Olappt.fae

Olappt.fae

16.0.4687.1000

134,464

17-Dec-2019

04:34

Olmapi32.dll

Olmapi32.dll

16.0.4951.1000

6,658,920

17-Dec-2019

04:34

Omsmain.dll

Omsmain.dll

16.0.4852.1000

1,004,392

17-Dec-2019

04:34

Omsxp32.dll

Omsxp32.dll

16.0.4924.1000

353,680

17-Dec-2019

04:34

Outllibr.dll_1033

Outllibr.dll

16.0.4873.1000

7,505,848

17-Dec-2019

04:33

Outlmime.dll

Outlmime.dll

16.0.4951.1000

788,848

17-Dec-2019

04:34

Outlook.exe

Outlook.exe

16.0.4954.1000

35,098,824

18-Dec-2019

16:50

Outlook.hol_1033

Outlook.hol

Not applicable

1,812,658

17-Dec-2019

04:33

Outlph.dll

Outlph.dll

16.0.4696.1000

429,344

17-Dec-2019

04:34

Outlvba.dll

Outlvba.dll

16.0.4951.1000

98,656

17-Dec-2019

04:34

Pstprx32.dll

Pstprx32.dll

16.0.4951.1000

2,588,472

17-Dec-2019

04:34

Recall.dll

Recall.dll

16.0.4759.1000

76,088

17-Dec-2019

04:34

Rm.dll

Rm.dll

16.0.4696.1000

110,776

17-Dec-2019

04:34

Scnpst32.dll

Scnpst32.dll

16.0.4933.1000

530,064

17-Dec-2019

04:34

Scnpst64.dll

Scnpst64.dll

16.0.4933.1000

533,152

17-Dec-2019

04:34

Scnpst64c.dll

Scnpst64c.dll

16.0.4933.1000

731,096

17-Dec-2019

04:34


x86

outlook-x-none.msp file information

File identifier

File name

File version

File size

Date

Time

Contab32.dll

Contab32.dll

16.0.4951.1000

156,496

17-Dec-2019

04:32

Dlgsetp.dll

Dlgsetp.dll

16.0.4945.1000

113,184

17-Dec-2019

04:32

Envelope.dll

Envelope.dll

16.0.4951.1000

191,336

17-Dec-2019

04:32

Mapiph.dll

Mapiph.dll

16.0.4933.1000

335,184

17-Dec-2019

04:32

Mapir.dll_1033

Mapir.dll

16.0.4723.1000

1,280,712

17-Dec-2019

04:31

Mimedir.dll

Mimedir.dll

16.0.4945.1000

450,344

17-Dec-2019

04:32

Olmapi32.dll

Olmapi32.dll

16.0.4951.1000

4,818,280

17-Dec-2019

04:32

Omsmain.dll

Omsmain.dll

16.0.4852.1000

753,304

17-Dec-2019

04:32

Omsxp32.dll

Omsxp32.dll

16.0.4924.1000

263,048

17-Dec-2019

04:32

Outllibr.dll_1033

Outllibr.dll

16.0.4873.1000

7,505,848

17-Dec-2019

04:31

Outlmime.dll

Outlmime.dll

16.0.4951.1000

615,800

17-Dec-2019

04:32

Outlook.exe

Outlook.exe

16.0.4954.1000

23,289,128

18-Dec-2019

16:56

Outlook.hol_1033

Outlook.hol

Not applicable

1,812,658

17-Dec-2019

04:31

Outlph.dll

Outlph.dll

16.0.4696.1000

358,680

17-Dec-2019

04:32

Outlvba.dll

Outlvba.dll

16.0.4951.1000

78,176

17-Dec-2019

04:32

Pstprx32.dll

Pstprx32.dll

16.0.4951.1000

1,401,136

17-Dec-2019

04:32

Rm.dll

Rm.dll

16.0.4702.1000

90,816

17-Dec-2019

04:32

Scnpst32.dll

Scnpst32.dll

16.0.4945.1000

424,616

17-Dec-2019

04:32

Scnpst64.dll

Scnpst64.dll

16.0.4951.1000

435,872

17-Dec-2019

04:32

Scnpst64c.dll

Scnpst64c.dll

16.0.4951.1000

634,832

17-Dec-2019

04:32

References

Learn 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.

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