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Summary

When you use Microsoft Outlook 2010 for Windows, the Nickname cache is stored as a hidden message in the default message store (for example, on the Microsoft Exchange server). Outlook for Mac uses a similar feature called Recent Addresses, however there are some differences. Like Microsoft Entourage for Mac 2008, Outlook 2016 for Mac and Outlook for Mac 2011 are intended to be purely locally cached mail clients. Changing the location or using a mail identity that is located on an external hard disk or a network is not supported.

This article contains a complete list of the most recent hotfix updates, public updates, and service packs for Microsoft Outlook. Some Outlook features depend on Microsoft Word and Microsoft Office components. Therefore, you should also install the latest updates for the Word and Office core components.

Note

The information in this article applies only to U.S. English versions of Outlook. Other language versions of Outlook have some updates that differ from the updates that are listed in this article. To find links to the most recent cumulative and public updates for Microsoft Office, see Office updates.

• Note: Outlook for Mac can only import Unicode-based.pst files, which are the standard format for Personal Folders files for Outlook (for Windows) 2003 and later versions.ANSI-formatted.pst files, also known as Outlook 97-2002 Personal Folders Files, were the standard personal folder format for saving data in Outlook for Windows in versions 97-2002.
• Outlook for Mac support tools. 11/4/2019; 3 minutes to read; S; C; A; Applies to: Outlook for Mac for Office 365; In this article Summary. This article describes some useful tools for Microsoft Outlook for Mac.
• For release information for Office 2019 for Mac, see the release notes and update history for Office for Mac. Updates for Office 2016 for Mac are available from Microsoft AutoUpdate (MAU). To use Microsoft AutoUpdate, start an Office application, such as Word, and then choose Help Check for Updates.

This article will be updated to reference new updates as they are released.

For more information about the most recent Outlook updates, refer to the following sections, as appropriate:

Click-to-Run installations of Office

The following updates apply only to Office clients that are installed by using a .msi file. They do not apply to click-to-run installations of Office. By default, click-to-run installations are automatically updated.

To determine whether you are using a Click-to-run version of Office, click the File tab in Outlook, and then click Office Account. If you see Office Updates under Product Information, as shown in the following figure, you are using a click-to-run installation of Office.

To see the latest version information for click-to-run installations, click Update Options, and then click View Updates.

For more information about click-to-run updates and to find the latest click-to-run version, go to the following Microsoft Office articles:

• Office 2016: Update history for Office 365 ProPlus (listed by date)
• Office 2013: Update history for Office 2013
• Office 2010: Update history for Office 2010 Click-to-Run products

Outlook 2016

MSI installations of Office 2016:

The following updates apply only to Office 2016 clients that are installed by using a .msi file. They do not apply to Click-to-run installations of Office 2016. By default, click-to-run installations are automatically updated. You cannot install the updates from these articles on click-to-run installations of Office 2016.

Outlook (global) update

3141453 January 3, 2017, update for Outlook 2016 (KB3141453)

Outlook Junk Email Filter update

3115407 August 2, 2016, update for Outlook 2016 Junk Email Filter (KB3115407)

Microsoft Word update

3128057 MS17-002: Description of the security update for Word 2016: January 10, 2017

Microsoft Office 2016 (Mso.dll) update

3141473 January 3, 2017, update for Office 2016 (KB3141473)

After you install all these updates, you should see the following versions of important files that are used by Outlook.

Outlook 2013

MSI installations of Office 2013:

The following updates apply only to Office 2013 clients that are installed by using a .msi file. They do not apply to Click-to-run installations of Office 2013. By default, click-to-run installations are automatically updated. You cannot install the updates from these articles on click-to-run installations of Office 2013.

Important

Updates for Office 2013 programs that are dated April 14, 2015, or later require Office 2013 Service Pack 1 (SP1) to be installed before you can install the update.

You can download and install Service Pack 1 for Office 2013 from the following Microsoft Knowledge Base article:

2817430 Description of Microsoft Office 2013 Service Pack 1 (SP1)

Outlook (global) update

3141466 January 3, 2017, update for Outlook 2013 (KB3141466)

Outlook (US English) update

2817430 Description of Microsoft Office 2013 Service Pack 1 (SP1)

Outlook Junk Email Filter update

3115404 August 2, 2016, update for Outlook 2013 Junk Email Filter (KB3115404)

Outlook Social Connector global update

3054854 June 9, 2015, update for Outlook 2013 (KB3054854)

Outlook Social Connector Facebook provider

3054856 June 9, 2015, update for Office 2013 (KB3054856)

Outlook (UMoutlookaddin.dll) update

3101487 November 10, 2015, update for Office 2013 (KB3101487)

Microsoft Word update

3141464 January 3, 2017, update for Word 2013 (KB3141464)

Microsoft Office 2013 (Mso.dll) update

3141474 January 3, 2017, update for Office 2013 (KB3141474)

After you install all these updates, you should see the following versions of important files that are used by Outlook.

Outlook 2010

Important

Updates for Office 2010 programs that are dated November 11, 2014, or later require Office 2010 Service Pack 2 (SP2) to be installed before you can install the update.

You can download and install Service Pack 2 for Office 2010 from the following Microsoft Knowledge Base article:

2687455 Description of Office 2010 Service Pack 2

Outlook (global) update

3118313 MS16-107: Description of the security update for Outlook 2010: September 13, 2016

Outlook (localized language en-us) update

3055041 August 11, 2015, update for Outlook 2010 (KB3055041)

Outlook Junk Email Filter update

3115475 August 2, 2016, update for Outlook 2010 Junk Email Filter (KB3115475)

Outlook Social Connector global update

2726880 June 9, 2015, update for Outlook Social Connector 2010 (KB2553308)

Outlook Social Connector update (US-English update)

Note

The following update is the latest released localized update package for the Outlook Social Connector. Therefore, you have to install only Oscintl-en-us.msp from the following package (for U.S. English versions of Outlook 2010). The Osc-x-none.msp file in the following article (2553406) was updated with a later version and is available in the global update for the Social Connector (KB2553308).

2553406 Description of the Outlook Social Connector update (Osc-x-none.msp, Oscintl-en-us.msp): April 10, 2012

Outlook Social Connector SharePoint Provider update

2553267 Description of the Outlook Social Connector update (Oscmoss-x-none.msp): April 10, 2012

Outlook (UMoutlookaddin.dll) update

2760779 December 8, 2015, update for Office 2010 (KB2760779)

Microsoft Word 2010

3128034 MS16-148: Description of the security update for Word 2010: December 13, 2016

Office 2010 (Mso.dll)

3118380 MS16-148: Description of the security update for Office 2010: December 13, 2016

After you install all these updates, you should see the following versions of important files that are used by Outlook.

Outlook 2007

The following hotfix packages dated February 2013 (or later versions) require you to have the 2007 Microsoft Office suite Service Pack 3 (SP3) installed before you install the update.

Outlook (global) update

3118303 MS16-107: Description of the security update for Outlook 2007: September 13, 2016

Outlook (US English) update

2687329 Description of the Outlook 2007 hotfix package (Outlook-en-us.msp): August 28, 2012

Outlook Junk Email Filter update

Outlook On Mac

3115461 August 2, 2016, update for Outlook 2007 Junk Email Filter (KB3115461)

2007 Microsoft Office system (Mso.dll) update

3128020 MS16-148: Description of the security update for 2007 Microsoft Office Suite: December 13, 2016

After you install all these updates, you should see the following versions of important files that are used by Outlook.

Outlook 2003

You must install Microsoft Office 2003 Service Pack 3 (SP3) before you install the following update.

Microsoft Word update

2878303 MS14-017: Description of the security update for Word 2003: April 8, 2014

After you install all the update, you should see the following versions of important files that are used by Outlook.

Microsoft Outlook 15.6.1 For Macbook Pro

After you install all these updates, click the Help menu, and then click About Microsoft Office Outlook. The About Microsoft Office Outlook dialog box should show the following build number.

Free Microsoft Outlook For Mac

The ongoing BETA of the next version of MacOS, Big Sur, comes with the bonus of a preview of the upcoming Microsoft Outlook for Mac. And just as there are some issues with the Big Sur BETA that Apple is working through, the preview of Outlook has some glaring, and extremely alarming, changes that will affect any user of any on-premises email server. It also gives some insight into the direction Microsoft is moving, and that direction itself is somewhat disturbing and may have people thinking twice if they want to continue using Microsoft's email clients.

The 2 biggest issues with the latest preview of Outlook for Mac are: Mickey mouse clubhouse lyrics.

1. It currently only works with Office365, Outlook.com and Google accounts. It offers ZERO SUPPORT for IMAP or iCloud accounts.
2. It DOES NOT SUPPORT on-premises Exchange accounts or connect to any on-premises mail servers that use Exchange protocols. (E.g., EWS)

In fact, when you install the latest Big Sur build, and then open Outlook for Mac, this is what you see if you have any Exchange accounts set up:

Microsoft Outlook For Mac Update

Is support for IMAP, iCloud and Exchange coming? It's unclear at this time, but it would be surprising if Microsoft didn't at least support IMAP. It, along with POP, have been the backbone of the receipt of emails since Day One. As for Exchange support, Microsoft did say back in late 2019 that support for on-premises Exchange was coming. But we’re now in the middle of October 2020, and Big Sur, which Outlook for Mac was apparently designed for, is slated to release in November. So, if Microsoft DOES include support for on-prem Exchange accounts, it is coming down to the wire.

Where Microsoft Is Headed

Back in 2014, Microsoft purchased a company called Accompli. Accompli was a service aimed to provide its users with a desktop email client experience on a mobile device. Their client included support for email, calendars, contacts and file sharing, and included support for cloud file services like Dropbox, OneDrive, etc. It even made all these items -- including files -- searchable from the device. It did this by sending all that information through Accompli servers, thereby aggregating the information to make it easier to index and search. Microsoft was so impressed they purchased Accompli and re-branded it as Outlook Mobile.

Now, however, it appears that this aggregation of data is where Microsoft is taking Outlook and this is where things start getting alarming, if not downright scary.

Imagine losing the ability to use your own mail server if you want to use any version of the Outlook client, and probably Windows Mail. Instead, you have to use Office 365. Or consider this scenario: You're able to use your own mail server, but in order to use an Outlook client, all the information that passes through your mail server first needs to “pass through” a Microsoft server before it downloads to Outlook. All your personal and business information, your contacts, your stored files and attachments filtering through, and probably stored on, a Microsoft cloud before it gets to you. The privacy implications of that boggles the mind. What enterprise organization will allow that?

Where Outlook Is Headed

Forget the aggregation of data. Let’s say Microsoft does NOT go in that direction. What’s the future of Outlook? Sure, Microsoft says they’re going to be including support for IMAP and on-premises Exchange, but they’ve had months to included it in the Outlook for Mac previews and it’s nowhere to be seen. And there’s no guarantee – if we look at Outlook for Mac – that any Outlook version, even Outlook for Windows, will support IMAP or Exchange protocols like EAS, EWS or MAPI.

Microsoft is already moving in a direction to unify Outlook’s look and usability, offering users the same experience regardless of the platform they’re on. Outlook for Mac is being re-designed to give Big Sur users a “more Big Sur-like' experience, so an overhaul of Outlook for Windows can’t be too far behind. And with that overhaul, does Microsoft shepherd in the demise of the standard methods of using Outlook? Namely, using the tried-and-true methods of connecting Outlook to your email account that have become the standard. Along with unifying the user experience, they’ve also talked about a new synchronization protocol that they’re testing with Windows 10 Mail: Microsoft Sync. That seems to be a pretty good indication of things to come.

Microsoft Outlook 15.6.1 For Mac Os

All indications are that all of this is the future of Microsoft. And if it IS, it's a scary direction. Considering the huge privacy issues surrounding Microsoft acting as an information repository, and the complete overhaul of how Outlook works on Windows and Mac, there’s a huge storm coming about whether this is right or really wrong. What is your opinion?

For more information on the changes to Outlook for Mac, see the following:

• Enhanced performance, designed for simplicity – the new Outlook for Mac (Microsoft)
• All-new Outlook for Mac app coming in October with Big Sur-inspired design and more (9to5Mac)
• Microsoft tweaks its ‘New Outlook’ for Mac-but no support for Exchange on-premises yet (The Register)