Microsoft Outlook For Mac 2016 Keeps Resyncing
May 20, 2019 When Microsoft Outlook 2016 for Mac connects to an Office 365 account, Autodiscover is redirected from HTTP to HTTPS, and you may receive a warning message that resembles the following: Outlook was redirected to the server Autodiscover-s.outlook.com to get new settings for your account user@domain.com. In Microsoft Outlook 2016 for Mac, you are repeatedly prompted for authentication while you're connected to your Office 365 account. This issue occurs because of the presence of duplicate tokens in the keychain. To resolve this issue in Outlook 2016 for Mac, install the February 2017 Outlook update (version 15.31.0) from the. You cannot connect to a server that is running Microsoft Exchange Server from a Microsoft Outlook 2016 for Mac or Outlook for Mac 2011 client after disabling Secure Sockets Layer (SSL) on the server. 2020-3-19 Tech support scams are an industry-wide issue where scammers trick you into paying for unnecessary technical support services. You can help protect yourself from scammers by verifying that the contact is a Microsoft Agent or Microsoft Employee and that the phone number is an official Microsoft global customer service number. So, I was having this BRUTALLY annoying issue on my macs (when I work from home, I work on my mac) where, every time I launched Outlook 2016, I would be prompted to login with my credentials. Just super annoying and unnecessary. Theres a ton of documentation on 'how to fix this' but a lot of it misses an important step (also, a facepalm step).
- Microsoft Outlook For Mac 2016 Keeps Resyncing Working
- Microsoft Outlook For Mac Free
- Outlook For Macintosh
Office 2016 for Mac is a version of Office that’s available as a one-time purchase from a retail store or through a volume licensing agreement. It will be supported with security updates and bug fixes, as needed, until October 13, 2020. The minimum supported macOS for Office 2016 for Mac is 10.10 (Yosemite).
Note
- For security reason, Microsoft has deprecated the use of SHA-1. Learn more
- For release notes for Office 2016 for Mac releases prior to September 2018, see Release notes for Office for Mac.
- For release information for Office for Mac, which is the version that comes with Office 365 subscriptions, see the release notes and update history for Office for Mac.
- Office 2019 for Mac is the most current version that’s available as a one-time purchase. 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. If you're an admin and want to update the computers in your organization with your existing software deployment tools, you can download and deploy the update packages for each application.
Most current packages for Office 2016 for Mac
The following table lists the most current packages for Office 2016 for Mac and for the individual applications, such as Word and Excel. All packages are 64-bit only. The build date is listed in parentheses, in a YYMMDD format, after the version number. The install package is used if you don't have the application already installed, while the update package is used to update an existing installation.
March 10, 2020
Microsoft Outlook For Mac 2016 Keeps Resyncing Working
Version 16.16.20 (20030700)
| Application | Download links | SHA256 hashes for install package |
|---|---|---|
| Office suite (all applications) | Install package | E6B38E17FECF5BF67CB08C5EF405BCEFE2079A079637D5800E1815B1FCB8E0B6 |
| Word | Install package Update package | 1B60C30C16005DE9D88C93DF5371BEC856944F98B8337D5408DC96C90A808E86 |
| Excel | Install package Update package | 4634B23F41A57B02D27F71C37D87856786DEF3653A40FFFFCEDF43857E1D9754 |
| PowerPoint | Install package Update package | B062BAD7FEE443EDA0F5804F4F7C6D90585F62D91B74BD47F9D1EDE29C13DFA8 |
| Outlook | Install package Update package | 07E736079C55DC0EB6C355FF45A51A2987D5623F8D1F8F485F378EE721937980 |
| OneNote | Update package | Not applicable |
March 2020 release
Release Date: March 10, 2020
Version 16.16.20 (Build 20030700)
This release provides the following updates.
| Application | Security updates | Download link for update package |
|---|---|---|
| Word | CVE-2020-0850 CVE-2020-0852 CVE-2020-0892 | Word update package |
| Excel | Excel update package | |
| PowerPoint | PowerPoint update package | |
| Outlook | Outlook update package | |
| OneNote | OneNote update package | |
| Office suite |
February 2020 release
Release Date: February 11, 2020
Version 16.16.19 (Build 20021000)
This release provides the following updates.
| Application | Security updates | Download link for update package |
|---|---|---|
| Word | Word update package | |
| Excel | CVE-2020-0759 | Excel update package |
| PowerPoint | PowerPoint update package | |
| Outlook | Outlook update package | |
| OneNote | OneNote update package | |
| Office suite |
January 2020 release
Release Date: January 14, 2020
Version 16.16.18 (Build 20011202)
This release provides the following updates.
| Application | Security updates | Download link for update package |
|---|---|---|
| Word | Word update package | |
| Excel | CVE-2020-0650 CVE-2020-0651 | Excel update package |
| PowerPoint | PowerPoint update package | |
| Outlook | Outlook update package | |
| OneNote | OneNote update package | |
| Office suite |
December 2019 release
Release Date: December 10, 2019
Version 16.16.17 (Build 19120800)
This release provides the following updates.
| Application | Security updates | Download link for update package |
|---|---|---|
| Word | Word update package | |
| Excel | CVE-2019-1464 | Excel update package |
| PowerPoint | CVE-2019-1462 | PowerPoint update package |
| Outlook | Outlook update package | |
| OneNote | OneNote update package | |
| Office suite |
November 2019 release
Release Date: November 12, 2019
Version 16.16.16 (Build 19111100)
This release provides the following updates.
| Application | Security updates | Download link for update package |
|---|---|---|
| Word | Word update package | |
| Excel | CVE-2019-1446 CVE-2019-1448 CVE-2019-1457 | Excel update package |
| PowerPoint | PowerPoint update package | |
| Outlook | Outlook update package | |
| OneNote | OneNote update package | |
| Office suite |
October 2019 release
Release Date: October 15, 2019
Version 16.16.15 (Build 19101400)
This release provides the following updates.
| Application | Security updates | Download link for update package |
|---|---|---|
| Word | Word update package | |
| Excel | CVE-2019-1327 CVE-2019-1331 | Excel update package |
| PowerPoint | PowerPoint update package | |
| Outlook | Outlook update package | |
| OneNote | OneNote update package | |
| Office suite |
September 2019 release
Release Date: September 10, 2019
Version 16.16.14 (Build 19090900)
This release provides the following updates.
| Application | Security updates | Download link for update package |
|---|---|---|
| Word | Word update package | |
| Excel | CVE-2019-1263 CVE-2019-1297 | Excel update package |
| PowerPoint | PowerPoint update package | |
| Outlook | Outlook update package | |
| OneNote | OneNote update package | |
| Office suite |
August 2019 release
Release Date: August 13, 2019
Version 16.16.13 (Build 19081100)
This release provides the following updates.
Writing a research or term paper in APA format? This starter template provides easy access to styles that match APA guidelines. This is an accessible template. Microsoft office. 2016-7-22 Now I have Word 2016 for MAC and am completely lost as to how to format an APA style paper. None of the old steps (page number, header/footer, etc) seem to apply. Does anyone know of a good online tutorial for APA Word 2016 for MAC? Any format help. This tutorial will guide you through the process of setting up Microsoft Word 2016 for your MLA Format paper. It is very easy and we are going to accomplish the following settings: All text is font “Times New Roman” & Size 12. One-inch page margin for all sides (top, bottom, right and left).

| Application | Security updates | Download link for update package |
|---|---|---|
| Word | CVE-2019-1201 CVE-2019-1205 | Word update package |
| Excel | Excel update package | |
| PowerPoint | PowerPoint update package | |
| Outlook | Outlook update package | |
| OneNote | OneNote update package | |
| Office suite |
July 2019 release
Release Date: July 16, 2019
Version 16.16.12 (Build 19071500)
This release provides the following updates.
| Application | Security updates | Download link for update package |
|---|---|---|
| Word | Word update package | |
| Excel | CVE-2019-1110 CVE-2019-1111 | Excel update package |
| PowerPoint | PowerPoint update package | |
| Outlook | CVE-2019-1084 | Outlook update package |
| OneNote | OneNote update package | |
| Office suite |
June 2019 release
Release Date: June 11, 2019
Version 16.16.11 (Build 19060902)
This release provides the following updates.
| Application | Security updates | Download link for update package |
|---|---|---|
| Word | CVE-2019-1034 CVE-2019-1035 | Word update package |
| Excel | Excel update package | |
| PowerPoint | PowerPoint update package | |
| Outlook | Outlook update package | |
| OneNote | OneNote update package | |
| Office suite |
May 2019 release
Release Date: May 14, 2019
Microsoft Outlook For Mac Free
Version 16.16.10 (Build 19051200)
This release provides the following updates.
| Application | Security updates | Download link for update package |
|---|---|---|
| Word | CVE-2019-0953 | Word update package |
| Excel | Excel update package | |
| PowerPoint | PowerPoint update package | |
| Outlook | Outlook update package | |
| OneNote | OneNote update package | |
| Office suite |
April 2019 release
Release Date: April 16, 2019
Outlook For Macintosh
Version 16.16.9 (Build 19041201)
This release provides the following updates.
| Application | Security updates | Download link for update package |
|---|---|---|
| Word | Word update package | |
| Excel | CVE-2019-0828 | Excel update package |
| PowerPoint | PowerPoint update package | |
| Outlook | Outlook update package | |
| OneNote | OneNote update package | |
| Office suite | CVE-2019-0822 |
March 2019 release
Release Date: March 12, 2019
Version 16.16.8 (Build 19031202)
This release provides the following updates.
| Application | Security updates | Download link for update package |
|---|---|---|
| Word | Word update package | |
| Excel | Excel update package | |
| PowerPoint | PowerPoint update package | |
| Outlook | Outlook update package | |
| OneNote | OneNote update package | |
| Office suite |
February 2019 release
Release Date: February 12, 2019
Version 16.16.7 (Build 19021001)

This release provides the following updates.
| Application | Security updates | Download link for update package |
|---|---|---|
| Word | Word update package | |
| Excel | CVE-2019-0669 | Excel update package |
| PowerPoint | PowerPoint update package | |
| Outlook | Outlook update package | |
| OneNote | OneNote update package | |
| Office suite |
January 2019 release
Release Date: January 16, 2019
Version 16.16.6 (Build 19011400)
This release provides the following updates.
| Application | Security updates | Download link for update package |
|---|---|---|
| Word | CVE-2019-0561: Microsoft Word Information Disclosure Vulnerability CVE-2019-0585: Microsoft Word Remote Code Execution Vulnerability | Word update package |
| Excel | Excel update package | |
| PowerPoint | PowerPoint update package | |
| Outlook | Outlook update package | |
| OneNote | OneNote update package | |
| Office suite |
December 2018 release
Release Date: December 11, 2018
Version 16.16.5 (Build 18120801)
This release provides the following updates.
| Application | Security updates | Download link for update package |
|---|---|---|
| Word | Word update package | |
| Excel | CVE-2018-8597: Microsoft Excel Remote Code Execution Vulnerability CVE-2018-8627: Microsoft Excel Information Disclosure Vulnerability | Excel update package |
| PowerPoint | CVE-2018-8628: Microsoft PowerPoint Remote Code Execution Vulnerability | PowerPoint update package |
| Outlook | Outlook update package | |
| OneNote | OneNote update package | |
| Office suite |
November 2018 release
Release Date: November 13, 2018
Version 16.16.4 (Build 18111001)
This release provides the following updates.
| Application | Security updates | Download link for update package |
|---|---|---|
| Word | Word update package | |
| Excel | CVE-2018-8574: Microsoft Excel Remote Code Execution Vulnerability CVE-2018-8577: Microsoft Excel Remote Code Execution Vulnerability | Excel update package |
| PowerPoint | PowerPoint update package | |
| Outlook | Outlook update package | |
| OneNote | OneNote update package | |
| Office suite |
October 2018 release
Release Date: October 16, 2018
Version 16.16.3 (Build 18101500)
This release provides the following updates.
| Application | Security updates | Download link for update package |
|---|---|---|
| Word | Word update package | |
| Excel | Excel update package | |
| PowerPoint | PowerPoint update package | |
| Outlook | Outlook update package | |
| OneNote | OneNote update package | |
| Office suite | CVE-2018-8432 Microsoft Graphics Components Remote Code Execution Vulnerability |
September 2018 release
Release Date: September 11, 2018
Version 16.16.2 (Build 18091001)
This release provides the following updates.
| Application | Security updates | Download link for update package |
|---|---|---|
| Word | Word update package | |
| Excel | CVE-2018-8429: Microsoft Excel Information Disclosure Vulnerability CVE-2018-8331: Microsoft Excel Remote Code Execution Vulnerability | Excel update package |
| PowerPoint | PowerPoint update package | |
| Outlook | Outlook update package | |
| OneNote | OneNote update package | |
| Office suite | CVE-2018-8332: Microsoft Graphics Remote Code Execution Vulnerability |
Symptoms
In Microsoft Outlook 2016 for Mac, you are repeatedly prompted for authentication while you're connected to your Office 365 account.
Cause
This issue occurs because of the presence of duplicate tokens in the keychain.
Resolution
To resolve this issue in Outlook 2016 for Mac, install the February 2017 Outlook update (version 15.31.0) from the following Office website:
Workaround
To work around this issue, delete any cached passwords for your account, and also delete any modern authentication tokens from the keychain. To do this, follow these steps.
Note
These steps affect all Office applications that use modern authentication.
Quit Outlook and all other Office applications.
Start Keychain Access by using one of the following methods:
- Select the Finder application, click Utilities on the Go menu, and then double-click Keychain Access.
- In Spotlight Search, type Keychain Access, and then double-click Keychain Access in the search results.
In the search field in Keychain Access, enter Exchange.
In the search results, select each item to view the Account that's listed at the top, and then press Delete. Repeat this step to delete all items for your Exchange account.
In the search field, enter adal.
Select all items whose type is MicrosoftOffice15_2_Data:ADAL:<GUID>, and then press Delete.
In the search field, enter office.
Select the items that are named Microsoft Office Identities Cache 2 and Microsoft Office Identities Settings 2, and then press Delete.
Quit Keychain Access.
Note
When you start Outlook, you are prompted to authenticate.