This article describes update 4018376 for Microsoft Outlook 2013 that was released on May 1, 2018. This update also applies to Office Home and Student 2013 RT. This update has a prerequisite.

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. (How to determine?)

Improvements and fixes

This update contains the following fixes and improvements:

  • Assume that Outlook 2013 is connected to an IMAP server that does not support UIDPLUS IMAP extensions. Then, you move an email message, and a network error occurs. After the network is restored and Outlook 2013 is synchronized with the server, the moved email message in the .OST file is lost. To fix this issue, install this update and then follow the steps in the "Registry information" section.

  • When you try to access the content of a public folder in Outlook 2013, Outlook 2013 may crash if it's connected by using MAPI/HTTP.

  • This update improves the Swiss translation.

  • Assume that you use Outlook 2013 for some time. Even if you have a reasonable memory usage, the contiguous free memory space is exhausted. This results in fragmented and non-rendering UI. This update enables the Large Address Aware (LAA) state for the 32-bit version of Outlook 2013. For more information, see KB 4022148.

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.

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

Registry information

After you install this update, you can follow these steps to fix the email message lost issue in Outlook 2013.

Important
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.

  1. Exit all Microsoft Office applications.

  2. Start Registry Editor:

    • In Windows 10, go to Start, enter regedit in the Search Windows box, and then select regedit.exe in the search results.

    • 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 and Windows 8.1, 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:

    HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\Outlook\IMAP\

  4. On the Edit menu, point to New, and then click DWORD Value.

  5. Type IMAPUIDRefactor, and then press Enter.

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

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

  8. Exit Registry Editor.

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

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

  1. Start an Office 2013 application, such as Microsoft Word 2013.

  2. On the File menu, select Account.

  3. For Office 2013 Click-to-Run installations, an Update Options item is displayed. For MSI-based installations, the Update Options item isn't displayed.

Office 2013 Click-to-Run installation

MSI-based Office 2013

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 then select update KB4018376, and then select Uninstall.

Windows 8 and Windows 8.1

  1. Swipe in from the right edge of the screen, and then tap 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 then select update KB4018376, 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 then select update KB4018376, and then select Uninstall.

References

Learn about the standard terminology that Microsoft uses to describe software updates.

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

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 the times for these files are listed in Coordinated Universal Time (UTC). The dates and the 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 the 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

15.0.5031.1000

144,096

10-Apr-2018

12:51

Dlgsetp.dll

Dlgsetp.dll

15.0.5023.1000

103,640

10-Apr-2018

12:51

Envelope.dll

Envelope.dll

15.0.5031.1000

170,232

10-Apr-2018

12:51

Localdv.dll_1033

Localdv.dll

15.0.4454.1000

36,960

10-Apr-2018

12:51

Mapiph.dll

Mapiph.dll

15.0.4957.1000

293,184

10-Apr-2018

12:51

Mapir.dll_1033

Mapir.dll

15.0.4867.1000

1,271,520

10-Apr-2018

12:51

Mapir.dll.idx_dll_1033

Mapir.dll.idx_dll

15.0.4541.1000

104,648

10-Apr-2018

12:51

Mimedir.dll

Mimedir.dll

15.0.5031.1000

403,624

10-Apr-2018

12:51

Notes.ico_1033

Notes.ico

Not applicable

2,998

10-Apr-2018

12:51

Oladd.fae

Oladd.fae

15.0.4454.1000

97,424

10-Apr-2018

12:51

Olappt.fae

Olappt.fae

15.0.4981.1000

100,672

10-Apr-2018

12:51

Oljrnl.fae

Oljrnl.fae

15.0.4454.1000

52,352

10-Apr-2018

12:51

Olmail.fae

Olmail.fae

15.0.4507.1000

47,328

10-Apr-2018

12:51

Olmapi32.dll

Olmapi32.dll

15.0.5031.1000

4,111,592

10-Apr-2018

12:51

Olnote.fae

Olnote.fae

15.0.4454.1000

40,056

10-Apr-2018

12:51

Olr.sam_1033

Olr.sam

15.0.4454.1000

14,448

10-Apr-2018

12:51

Oltask.fae

Oltask.fae

15.0.4727.1000

84,704

10-Apr-2018

12:51

Omsmain.dll

Omsmain.dll

15.0.4869.1000

762,120

10-Apr-2018

12:51

Omsxp32.dll

Omsxp32.dll

15.0.4869.1000

256,808

10-Apr-2018

12:51

Outlctl.dll

Outlctl.dll

15.0.4713.1000

125,088

10-Apr-2018

12:51

Outllibr.dll_1033

Outllibr.dll

15.0.4945.1000

7,422,696

10-Apr-2018

12:51

Outllibr.dll.idx_dll_1033

Outllibr.dll.idx_dll

15.0.4763.1000

111,816

10-Apr-2018

12:51

Outllibr.rest.idx_dll_1033

Outllibr.rest.idx_dll

15.0.4867.1000

298,248

10-Apr-2018

12:51

Outlmime.dll

Outlmime.dll

15.0.5031.1000

553,728

10-Apr-2018

12:51

Outlook.exe

Outlook.exe

15.0.5031.1000

19,168,944

10-Apr-2018

12:51

Outlook.man

Outlook.exe.manifest

Not applicable

1,856

10-Apr-2018

12:51

Outlook.hol_1033

Outlook.hol

Not applicable

1,287,616

10-Apr-2018

12:51

Outlph.dll

Outlph.dll

15.0.4997.1000

322,328

10-Apr-2018

12:51

Outlrpc.dll

Outlrpc.dll

15.0.4454.1000

30,776

10-Apr-2018

12:51

Outlvba.dll

Outlvba.dll

15.0.5031.1000

67,816

10-Apr-2018

12:51

Outlwvw.dll_1033

Outlwvw.dll

15.0.4454.1000

123,968

10-Apr-2018

12:51

Pstprx32.dll

Pstprx32.dll

15.0.5031.1000

1,321,656

10-Apr-2018

12:51

Recall.dll

Recall.dll

15.0.4779.1000

43,184

10-Apr-2018

12:51

Rm.dll

Rm.dll

15.0.4867.1000

85,208

10-Apr-2018

12:51

Scnpst32.dll

Scnpst32.dll

15.0.5031.1000

469,320

10-Apr-2018

12:51

Scnpst64.dll

Scnpst64.dll

15.0.5031.1000

480,592

10-Apr-2018

12:51

Scnpst64c.dll

Scnpst64c.dll

15.0.5031.1000

681,824

10-Apr-2018

12:51

Sendto.dll

Sendto.dll

15.0.4454.1000

23,656

10-Apr-2018

12:51

Transmgr.dll

Transmgr.dll

15.0.4545.1000

112,320

10-Apr-2018

12:51

x64

outlook-x-none.msp file information

File identifier

File name

File version

File size

Date

Time

Contab32.dll

Contab32.dll

15.0.5031.1000

191,200

10-Apr-2018

12:53

Dlgsetp.dll

Dlgsetp.dll

15.0.5031.1000

139,472

10-Apr-2018

12:53

Envelope.dll

Envelope.dll

15.0.5031.1000

229,616

10-Apr-2018

12:53

Localdv.dll_1033

Localdv.dll

15.0.4454.1000

39,008

10-Apr-2018

12:54

Mapiph.dll

Mapiph.dll

15.0.4957.1000

425,280

10-Apr-2018

12:53

Mapir.dll_1033

Mapir.dll

15.0.4867.1000

1,271,520

10-Apr-2018

12:54

Mapir.dll.idx_dll_1033

Mapir.dll.idx_dll

15.0.4541.1000

104,648

10-Apr-2018

12:54

Mimedir.dll

Mimedir.dll

15.0.5031.1000

553,648

10-Apr-2018

12:53

Notes.ico_1033

Notes.ico

Not applicable

2,998

10-Apr-2018

12:54

Oladd.fae

Oladd.fae

15.0.4454.1000

131,728

10-Apr-2018

12:53

Olappt.fae

Olappt.fae

15.0.4981.1000

131,896

10-Apr-2018

12:53

Oljrnl.fae

Oljrnl.fae

15.0.4779.1000

72,936

10-Apr-2018

12:53

Olmail.fae

Olmail.fae

15.0.4454.1000

64,136

10-Apr-2018

12:53

Olmapi32.dll

Olmapi32.dll

15.0.5031.1000

5,607,656

10-Apr-2018

12:53

Olnote.fae

Olnote.fae

15.0.4454.1000

54,392

10-Apr-2018

12:53

Olr.sam_1033

Olr.sam

15.0.4454.1000

16,008

10-Apr-2018

12:54

Oltask.fae

Oltask.fae

15.0.4727.1000

113,888

10-Apr-2018

12:53

Omsmain.dll

Omsmain.dll

15.0.4869.1000

1,070,856

10-Apr-2018

12:53

Omsxp32.dll

Omsxp32.dll

15.0.4869.1000

363,824

10-Apr-2018

12:53

Outlctl.dll

Outlctl.dll

15.0.4805.1000

179,904

10-Apr-2018

12:53

Outllibr.dll_1033

Outllibr.dll

15.0.4945.1000

7,422,696

10-Apr-2018

12:54

Outllibr.dll.idx_dll_1033

Outllibr.dll.idx_dll

15.0.4763.1000

111,816

10-Apr-2018

12:54

Outllibr.rest.idx_dll_1033

Outllibr.rest.idx_dll

15.0.4867.1000

298,248

10-Apr-2018

12:54

Outlmime.dll

Outlmime.dll

15.0.5031.1000

750,848

10-Apr-2018

12:53

Outlook.exe

Outlook.exe

15.0.5031.1000

27,390,128

10-Apr-2018

12:53

Outlook.man

Outlook.exe.manifest

Not applicable

1,856

10-Apr-2018

12:53

Outlook.hol_1033

Outlook.hol

Not applicable

1,287,616

10-Apr-2018

12:54

Outlph.dll

Outlph.dll

15.0.4997.1000

381,720

10-Apr-2018

12:53

Outlrpc.dll

Outlrpc.dll

15.0.4454.1000

38,984

10-Apr-2018

12:53

Outlvba.dll

Outlvba.dll

15.0.5031.1000

87,776

10-Apr-2018

12:53

Outlwvw.dll_1033

Outlwvw.dll

15.0.4454.1000

125,504

10-Apr-2018

12:54

Pstprx32.dll

Pstprx32.dll

15.0.5031.1000

2,052,800

10-Apr-2018

12:53

Recall.dll

Recall.dll

15.0.4833.1000

70,360

10-Apr-2018

12:53

Rm.dll

Rm.dll

15.0.4867.1000

106,200

10-Apr-2018

12:53

Scnpst32.dll

Scnpst32.dll

15.0.5031.1000

588,096

10-Apr-2018

12:53

Scnpst64.dll

Scnpst64.dll

15.0.5031.1000

589,648

10-Apr-2018

12:53

Scnpst64c.dll

Scnpst64c.dll

15.0.5031.1000

789,344

10-Apr-2018

12:53

Sendto.dll

Sendto.dll

15.0.4454.1000

27,216

10-Apr-2018

12:53

Transmgr.dll

Transmgr.dll

15.0.4454.1000

142,432

10-Apr-2018

12:53

Need more help?

Expand your skills
Explore Training
Get new features first
Join Microsoft Insiders

Was this information helpful?

What affected your experience?

Thank you for your feedback!

×