This article describes update 4464540 for Microsoft Outlook 2016 that was released on May 7, 2019.

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 makes the following improvement for all-day meetings:

  • All-day meetings now display on the same month and date(s) for the organizer and all attendees, regardless of the organizer's time zone, the meeting's time zone, or each attendee’s time zone. For all-day and multi-day meetings, the When field shows the start dates and the end dates with "(All day)" instead of specific times.

This update also fixes the following issues:

  • You cannot send email messages as a mail-enabled public folder.

  • You are unable to synchronize folders in Outlook 2016 and you experience the MAPI_E_INVALID_PARAMETER error either in a sync process or in the Outlook Send/Receive Process dialog box.

  • When you reply or forward digitally signed email messages with Secure Multipurpose Internet Mail Extensions (S/MIME), Outlook 2016 incorrectly blocks images in the email messages.

  • Outlook 2016 is performing Exchange Web Services (EWS) calls on startup to check for Group settings. In Cached Mode, EWS calls are expected to occur in the background after the startup is complete.

How to download and install the update

Microsoft Update

Use Microsoft Update to automatically download and install the update.

Download Center

This update is also 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

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 KB4464540, 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 KB4464540, 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 KB4464540, 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

16.0.4849.1000

203,392

17-Apr-2019

11:07

Dlgsetp.dll

Dlgsetp.dll

16.0.4849.1000

139,592

17-Apr-2019

11:07

Envelope.dll

Envelope.dll

16.0.4849.1000

248,984

17-Apr-2019

11:07

Mapiph.dll

Mapiph.dll

16.0.4849.1000

481,488

17-Apr-2019

11:07

Mapir.dll_1033

Mapir.dll

16.0.4723.1000

1,280,744

15-Apr-2019

23:54

Mimedir.dll

Mimedir.dll

16.0.4849.1000

601,160

17-Apr-2019

11:07

Olappt.fae

Olappt.fae

16.0.4687.1000

134,464

15-Apr-2019

23:55

Olmapi32.dll

Olmapi32.dll

16.0.4849.1000

6,655,120

17-Apr-2019

11:07

Omsmain.dll

Omsmain.dll

16.0.4783.1000

1,004,368

15-Apr-2019

23:55

Omsxp32.dll

Omsxp32.dll

16.0.4783.1000

352,136

15-Apr-2019

23:55

Outllibr.dll_1033

Outllibr.dll

16.0.4828.1000

7,496,304

15-Apr-2019

23:54

Outlmime.dll

Outlmime.dll

16.0.4849.1000

786,592

17-Apr-2019

11:07

Outlook.exe

Outlook.exe

16.0.4849.1000

35,085,400

17-Apr-2019

11:07

Outlook.hol_1033

Outlook.hol

Not applicable

1,336,360

15-Apr-2019

23:54

Outlph.dll

Outlph.dll

16.0.4696.1000

429,344

15-Apr-2019

23:55

Outlvba.dll

Outlvba.dll

16.0.4849.1000

97,120

17-Apr-2019

11:07

Pstprx32.dll

Pstprx32.dll

16.0.4849.1000

2,584,672

17-Apr-2019

11:07

Recall.dll

Recall.dll

16.0.4759.1000

76,088

15-Apr-2019

23:55

Rm.dll

Rm.dll

16.0.4696.1000

110,776

15-Apr-2019

23:55

Scnpst32.dll

Scnpst32.dll

16.0.4849.1000

528,104

17-Apr-2019

11:07

Scnpst64.dll

Scnpst64.dll

16.0.4849.1000

531,192

17-Apr-2019

11:07

Scnpst64c.dll

Scnpst64c.dll

16.0.4849.1000

729,560

17-Apr-2019

11:07


x86

outlook-x-none.msp file information

File identifier

File name

File version

File size

Date

Time

Contab32.dll

Contab32.dll

16.0.4849.1000

154,968

17-Apr-2019

11:04

Dlgsetp.dll

Dlgsetp.dll

16.0.4849.1000

111,224

17-Apr-2019

11:04

Envelope.dll

Envelope.dll

16.0.4849.1000

189,592

17-Apr-2019

11:04

Mapiph.dll

Mapiph.dll

16.0.4849.1000

333,008

17-Apr-2019

11:04

Mapir.dll_1033

Mapir.dll

16.0.4723.1000

1,280,712

15-Apr-2019

23:45

Mimedir.dll

Mimedir.dll

16.0.4849.1000

446,544

17-Apr-2019

11:04

Olmapi32.dll

Olmapi32.dll

16.0.4849.1000

4,813,968

17-Apr-2019

11:04

Omsmain.dll

Omsmain.dll

16.0.4702.1000

753,392

15-Apr-2019

23:45

Omsxp32.dll

Omsxp32.dll

16.0.4810.1000

261,520

15-Apr-2019

23:45

Outllibr.dll_1033

Outllibr.dll

16.0.4828.1000

7,496,520

15-Apr-2019

23:45

Outlmime.dll

Outlmime.dll

16.0.4849.1000

614,288

17-Apr-2019

11:04

Outlook.exe

Outlook.exe

16.0.4849.1000

23,278,672

17-Apr-2019

11:04

Outlook.hol_1033

Outlook.hol

Not applicable

1,336,360

15-Apr-2019

23:45

Outlph.dll

Outlph.dll

16.0.4696.1000

358,680

15-Apr-2019

23:45

Outlvba.dll

Outlvba.dll

16.0.4849.1000

76,424

17-Apr-2019

11:04

Pstprx32.dll

Pstprx32.dll

16.0.4849.1000

1,397,856

17-Apr-2019

11:04

Rm.dll

Rm.dll

16.0.4702.1000

90,816

15-Apr-2019

23:45

Scnpst32.dll

Scnpst32.dll

16.0.4849.1000

422,848

17-Apr-2019

11:04

Scnpst64.dll

Scnpst64.dll

16.0.4849.1000

433,912

17-Apr-2019

11:04

Scnpst64c.dll

Scnpst64c.dll

16.0.4849.1000

633,096

17-Apr-2019

11:04

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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