Due to the popularity of Outlook, most of the users ask to use Outlook on Mac devices thus Microsoft released Outlook for Mac. Users can share calendars, notes, send/ receive mails on Outlook for Mac same as MS Outlook. To update the files in OST and PST outlook perform synchronization but some users complain of Outlook for Mac error ‘Microsoft Sync Services has encountered a problem and needs to close. We are sorry for the inconvenience’. To fix this error it is advised to clear Outlook Mac cache.
Mar 01, 2019 The Teams Meeting button is missing in Outlook for Mac. STATUS: FIXED. The Teams Meeting button will only appear in the Outlook for Mac ribbon if Outlook is running Production Build 16.20 and later.Office 365 mailboxes require REST calendar sync. REST calendar sync is slowly being rolled out into Production. An 'Outlook restart required. Jan 25, 2019 Outlook for Mac works with Microsoft Exchange, Office 365, Outlook.com (including Hotmail and MSN), Gmail, Yahoo Mail, and iCloud Learn more about Office 365 Office 365 is a cloud-based subscription service that brings together premium versions of Word, Excel, PowerPoint, Outlook and OneDrive, with the best tools for the way people work today.
The main causes of Outlook Mac sync problem with Mac are
- Synchronizations preferences settings are not properly configured
- Outlook for Mac sync cache has not been cleared
These could be the two reasons causing error, solving these problems will fix the Outlook for Mac Sync Error
Methods to Solve ‘Outlook for Mac Sync’ Issue
Follow the below given steps to solve Outlook 2016 Mac Sync problem
Disable Sync Services Preferences
- Start Outlook in your system (if it opens)
- Click on Preferences in the Outlook menu
- Under the Other options select Sync Services
- Uncheck all the boxes and close Outlook
- Restart Outlook and check the error is solved or not
This will disable the sync services, if the error is resolved it means the sync preferences are corrupted and needs to be reset. To reset Outlook for Mac sync problems check the below given steps
Force Quit Outlook
- Click on the Apple menu
- A dialog box with all the active/ running applications will appear
- Select all the applications except Finder
- Now click on the ‘Force Quit’ button
- Before quitting any application, back up all items, Outlook identities for later use
Take Backup of Outlook Identities
- Click on Go menu and then Home
- Select Documents and open Microsoft User Data

- Press the control key, and then click Office 2011 identities
- Select Copy ‘Office 2011 Identities’ and close all windows
- Go to desktop, press the control key and then click on Paste
How to Reset Microsoft Sync Services in Outlook for Mac
- Click on Go menu and hold the OPTION Key to Open Library
- Go to Preferences and delete com.microsoft.Outlook.SyncServicesPreferences.plist, com.microsoft.Outlook.SyncServices.plist, OfficeSync Prefs
- Go to Application Support, then Microsoft and Office 2011
- Move OfficeSync Prefs to the trash folder
- Now restart the system and open Outlook
- Go to Preferences>> Other and select Sync Services
- Now check mark all the items to sync
- Close Outlook and Open again
Clear Outlook for Mac Sync Services Cache
- First Disable Sync services and close all applications
- On the Go Menu click on Applications>> Utilities and then open Activity Monitor
- Type Syncto in Filter box
- Quit all the processes found in list
- When the task gets completes close Activity Monitor
- Go to Home and then click /Library/Application Support/,
- Open SyncServices and move all the files to trash
- Restart all applications and turn on sync services
This will remove the Outlook for Mac Sync Error. You can try any of the above methods as per the system and error encountered. But always back up files before starting any process. These manual steps will remove the Microsoft Sync problem in Outlook for Mac.
This article tells you everything you can expect from the all-new Outlook for Mac.
Requirements
macOS version 10.14 (Mojave) and later.
Outlook version 16.32 (19110306) and later.
An Office 365, Outlook.com, or Google account.
No shared or delegated accounts.
For other requirements, refer to System requirements for Office.
How to try the new experience
Join Office Insider Fast: https://insider.office.com/en-us/join/mac.
Select Check for Updates to install the latest Insider Fast update.
Open or restart Outlook, then turn on the New Outlook switch.
What's new in Outlook for Mac
The new Outlook has many new features and improved experiences, including:
Customizable toolbar
Choose commands to display in the Toolbar. In the Toolbar, select the more icon , then Customize Toolbar… .
Improved search
Search is now powered by Microsoft Search and has better results and suggestions. Click in the search field or use keyboard shortcut Shift+Command+F to search.
My Day
View upcoming events in agenda or day view in the main window for mail. Select My Day in the View menu or use keyboard shortcut Shift+Command+] to turn My Day on or off.
Improved RSVP to meetings
Respond to meeting invites with email responses to the organizer directly from the Reading Pane. Type a message in the text field in the meeting invite and select Accept, Tentative, Decline, or Propose New Time.
More Office 365 Groups, including Calendars
View all your Office 365 Groups in Mail and Calendar view. In Mail, Groups are located under the Groups node for your account. In Calendar, Groups are located after calendar folders for your account.
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Nested compose in the Reading Pane
Reply to messages without opening a new compose window. Select Reply, Reply All, or Forward in the Reading Pane, Toolbar, or Message menu or use keyboard shortcuts Command+R, Shift+Command+R, or Command+J.
Ignore Conversation
Delete all messages in a conversation, including messages already received and any new messages. Select Ignore Conversation in the Toolbar, Message menu, or message context menu, then confirm that you want to ignore the conversation.
Improved event scheduling
Create events by selecting a time block in the calendar grid. Add event details, including attendees and locations, and view attendee availability directly in the popover before sending.
When creating a new meeting, view attendee availability directly in the event window and adjust the time of the event by moving the event within the day view.
For meetings with large numbers of attendees, use the Scheduling Assistant to view availability, add and remove attendees, and reserve resources (such as conference rooms).
Features not yet available in the new Outlook for Mac
There are several features that are available in the current version of Outlook for Mac for Office 365 that aren't yet available in the new Outlook experience.
Add-ins
Block sender
Delegates
Email templates
Online archive
Rules
Read and delivery receipts
S/MIME
Set message sensitivity
Unified Inbox
Room Finder
People search
Contacts
Tasks
Notes
Automatic replies - Now available in 16.36 (20032300)
Presence - Now available in 16.35 (20012902)
Subfolder search - Now available in 16.33 (19120401)
Known issues
The product team knows about and is investigating the following issues in the new Outlook for Mac:
Favorite folders can't be re-ordered in the sidebar
Snooze and Dismiss actions on Reminders don't sync across devices
Mail and events can't be copied to other folders
Shared calendars can't be added using Open Other User's Folder
Delegated and shared inboxes can't be added using Open Other User's Folder
Account descriptions can't be renamed - Now fixed in 16.33 (19120904)
Reporting issues and providing feedback
There are various ways to report issues and provide feedback to help improve the experience.
Contact Support
Please report issues using Contact Support in the Help menu.
After opening a support request, a help icon will appear next to the New Outlook switch to provide easy access to the current request.
Additionally, when a support agent provides a response, a red badge will appear on the help icon.
Feature requests
Sync Outlook Mac With Microsoft 365 Download
Please vote for feature requests using Suggest a Feature in the Help menu. This will open a UserVoice site dedicated to the new Outlook for Mac.
How to switch back
At any time, you can switch back by turning off the New Outlook switch.
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Before switching back, you'll have the opportunity to provide feedback on the experience and to create an in-app reminder for when additional features become available.