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This article describes update 4493174 for Microsoft Outlook 2013 that was released on March 2, 2021. This update also applies to Office Home and Student 2013 RT.

Be aware that the update in the Microsoft Download Center applies to the Microsoft Installer (.msi)-based edition of Office 2013. It doesn't apply to the Office 2013 Click-to-Run editions, such as Microsoft Office 365 Home (see What version of Office am I using?).

Improvements and fixes

This update fixes an issue that causes file attachments to become corrupted in the Office 365 Message Encryption (OME) encrypted messages.

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. The updates in the Download Center can't be installed on Office Home and Student 2013 RT.

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 2013 Service Pack 1 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 KB4493174, 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 KB4493174, 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 KB4493174, 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.

x86

outlook-x-none.msp file information

File identifier

File name

File version

File size

Date

Time

Contab32.dll

Contab32.dll

15.0.5125.1000

144,168

10-Feb-2021

08:35

Delimr.fae_1033

Delimr.fae

15.0.4420.1017

10,416

10-Feb-2021

08:35

Dlgsetp.dll

Dlgsetp.dll

15.0.5119.1000

103,512

10-Feb-2021

08:35

Envelope.dll

Envelope.dll

15.0.5233.1000

163,424

10-Feb-2021

08:35

Localdv.dll_1033

Localdv.dll

15.0.4454.1000

36,960

10-Feb-2021

08:35

Mapiph.dll

Mapiph.dll

15.0.5037.1000

292,656

10-Feb-2021

08:35

Mapir.dll_1033

Mapir.dll

15.0.5053.1000

1,271,504

10-Feb-2021

08:35

Mapir.dll.idx_dll_1033

Mapir.dll.idx_dll

15.0.4541.1000

104,648

10-Feb-2021

08:35

Mimedir.dll

Mimedir.dll

15.0.5125.1000

404,768

10-Feb-2021

08:35

Notes.ico_1033

Notes.ico

Not applicable

2,998

10-Feb-2021

08:35

Oladd.fae

Oladd.fae

15.0.4454.1000

97,424

10-Feb-2021

08:35

Olappt.fae

Olappt.fae

15.0.4981.1000

100,672

10-Feb-2021

08:35

Olapptr.fae_1033

Olapptr.fae

15.0.5323.1000

14,232

10-Feb-2021

08:35

Oljrnl.fae

Oljrnl.fae

15.0.4454.1000

52,352

10-Feb-2021

08:35

Olmail.fae

Olmail.fae

15.0.4507.1000

47,328

10-Feb-2021

08:35

Olmapi32.dll

Olmapi32.dll

15.0.5301.1000

4,104,088

10-Feb-2021

08:35

Olnote.fae

Olnote.fae

15.0.4454.1000

40,056

10-Feb-2021

08:35

Olr.sam_1033

Olr.sam

15.0.4454.1000

14,448

10-Feb-2021

08:35

Oltask.fae

Oltask.fae

15.0.4727.1000

84,704

10-Feb-2021

08:35

Omsmain.dll

Omsmain.dll

15.0.5233.1000

755,088

10-Feb-2021

08:35

Omsxp32.dll

Omsxp32.dll

15.0.5233.1000

249,744

10-Feb-2021

08:35

Outlctl.dll

Outlctl.dll

15.0.4713.1000

125,088

10-Feb-2021

08:35

Outllibr.dll_1033

Outllibr.dll

15.0.5153.1000

7,423,056

10-Feb-2021

08:35

Outllibr.dll.idx_dll_1033

Outllibr.dll.idx_dll

15.0.4763.1000

111,816

10-Feb-2021

08:35

Outllibr.rest.idx_dll_1033

Outllibr.rest.idx_dll

15.0.5045.1000

298,216

10-Feb-2021

08:35

Outlmime.dll

Outlmime.dll

15.0.5259.1000

547,736

10-Feb-2021

08:35

Outlook.exe

Outlook.exe

15.0.5327.1000

19,177,888

10-Feb-2021

08:35

Outlook.man

Outlook.exe.manifest

Not applicable

1,856

10-Feb-2021

08:35

Outlook.hol_1033

Outlook.hol

Not applicable

1,287,616

10-Feb-2021

08:35

Outlph.dll

Outlph.dll

15.0.5037.1000

322,328

10-Feb-2021

08:35

Outlrpc.dll

Outlrpc.dll

15.0.4454.1000

30,776

10-Feb-2021

08:35

Outlvba.dll

Outlvba.dll

15.0.5223.1000

61,560

10-Feb-2021

08:35

Outlwvw.dll_1033

Outlwvw.dll

15.0.4454.1000

123,968

10-Feb-2021

08:35

Pstprx32.dll

Pstprx32.dll

15.0.5125.1000

1,321,768

10-Feb-2021

08:35

Recall.dll

Recall.dll

15.0.4779.1000

43,184

10-Feb-2021

08:35

Rm.dll

Rm.dll

15.0.4867.1000

85,208

10-Feb-2021

08:35

Scnpst32.dll

Scnpst32.dll

15.0.5125.1000

469,288

10-Feb-2021

08:35

Scnpst64.dll

Scnpst64.dll

15.0.5125.1000

480,848

10-Feb-2021

08:35

Scnpst64c.dll

Scnpst64c.dll

15.0.5125.1000

681,768

10-Feb-2021

08:35

Sendto.dll

Sendto.dll

15.0.4454.1000

23,656

10-Feb-2021

08:35

Transmgr.dll

Transmgr.dll

15.0.4545.1000

112,320

10-Feb-2021

08:35

x64

outlook-x-none.msp file information

File identifier

File name

File version

File size

Date

Time

Contab32.dll

Contab32.dll

15.0.5125.1000

191,056

10-Feb-2021

08:35

Dlgsetp.dll

Dlgsetp.dll

15.0.5125.1000

139,344

10-Feb-2021

08:35

Envelope.dll

Envelope.dll

15.0.5233.1000

222,608

10-Feb-2021

08:35

Localdv.dll_1033

Localdv.dll

15.0.4454.1000

39,008

10-Feb-2021

08:35

Mapiph.dll

Mapiph.dll

15.0.5037.1000

425,264

10-Feb-2021

08:35

Mapir.dll_1033

Mapir.dll

15.0.5053.1000

1,271,496

10-Feb-2021

08:35

Mapir.dll.idx_dll_1033

Mapir.dll.idx_dll

15.0.4541.1000

104,648

10-Feb-2021

08:35

Mimedir.dll

Mimedir.dll

15.0.5119.1000

554,792

10-Feb-2021

08:35

Notes.ico_1033

Notes.ico

Not applicable

2,998

10-Feb-2021

08:35

Oladd.fae

Oladd.fae

15.0.4454.1000

131,728

10-Feb-2021

08:35

Olappt.fae

Olappt.fae

15.0.4981.1000

131,896

10-Feb-2021

08:35

Oljrnl.fae

Oljrnl.fae

15.0.4779.1000

72,936

10-Feb-2021

08:35

Olmail.fae

Olmail.fae

15.0.4454.1000

64,136

10-Feb-2021

08:35

Olmapi32.dll

Olmapi32.dll

15.0.5301.1000

5,597,080

10-Feb-2021

08:35

Olnote.fae

Olnote.fae

15.0.4454.1000

54,392

10-Feb-2021

08:35

Olr.sam_1033

Olr.sam

15.0.4454.1000

16,008

10-Feb-2021

08:35

Oltask.fae

Oltask.fae

15.0.4727.1000

113,888

10-Feb-2021

08:35

Omsmain.dll

Omsmain.dll

15.0.5233.1000

1,063,824

10-Feb-2021

08:35

Omsxp32.dll

Omsxp32.dll

15.0.5233.1000

356,952

10-Feb-2021

08:35

Outlctl.dll

Outlctl.dll

15.0.4805.1000

179,904

10-Feb-2021

08:35

Outllibr.dll_1033

Outllibr.dll

15.0.5153.1000

7,423,064

10-Feb-2021

08:35

Outllibr.dll.idx_dll_1033

Outllibr.dll.idx_dll

15.0.4763.1000

111,816

10-Feb-2021

08:35

Outllibr.rest.idx_dll_1033

Outllibr.rest.idx_dll

15.0.5045.1000

298,224

10-Feb-2021

08:35

Outlmime.dll

Outlmime.dll

15.0.5259.1000

745,864

10-Feb-2021

08:35

Outlook.exe

Outlook.exe

15.0.5327.1000

27,377,056

10-Feb-2021

08:35

Outlook.man

Outlook.exe.manifest

Not applicable

1,856

10-Feb-2021

08:35

Outlook.hol_1033

Outlook.hol

Not applicable

1,287,616

10-Feb-2021

08:35

Outlph.dll

Outlph.dll

15.0.5037.1000

381,720

10-Feb-2021

08:35

Outlrpc.dll

Outlrpc.dll

15.0.4454.1000

38,984

10-Feb-2021

08:35

Outlvba.dll

Outlvba.dll

15.0.5223.1000

82,016

10-Feb-2021

08:35

Outlwvw.dll_1033

Outlwvw.dll

15.0.4454.1000

125,504

10-Feb-2021

08:35

Pstprx32.dll

Pstprx32.dll

15.0.5233.1000

2,045,832

10-Feb-2021

08:35

Recall.dll

Recall.dll

15.0.4833.1000

70,360

10-Feb-2021

08:35

Rm.dll

Rm.dll

15.0.5233.1000

99,424

10-Feb-2021

08:35

Scnpst32.dll

Scnpst32.dll

15.0.5125.1000

588,072

10-Feb-2021

08:35

Scnpst64.dll

Scnpst64.dll

15.0.5125.1000

589,608

10-Feb-2021

08:35

Scnpst64c.dll

Scnpst64c.dll

15.0.5125.1000

789,072

10-Feb-2021

08:35

Sendto.dll

Sendto.dll

15.0.4454.1000

27,216

10-Feb-2021

08:35

Transmgr.dll

Transmgr.dll

15.0.4454.1000

142,432

10-Feb-2021

08:35

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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