Table of contents

Last updated: July, 2021

Outlook for Mac features, add-ins, and know issues

Last updated: August, 2017


When you send an email with an attachment larger than 25 MB, you get an error message and the mail doesn’t go through.

Error about large attachments

STATUS: Workaround

We’re working to resolve this issue. In the meantime, please use your Web mail when sending attachments that are larger than 25 MB.

Changed functionality and blocked or discontinued features

Automated troubleshooting tools

Use the following tools to resolve various Outlook for Mac issues. See this page for more information and learn how to install the tools: Outlook for Mac support tools.

Outlook Search Repair

Note: This tool doesn’t work on macOS 10.14 and later. Check Outlook for Mac support tools article here for more details.

This tool repairs search issues in Outlook for Mac. For example, when search returns no results for items that do exist in your mailbox, or you get older data when you have newer items.

Outlook Reset Preferences

This tool resets customization that you've made to Outlook from the Outlook menu > Preferences. It also restores Outlook window size and position settings.

Set Default Mail App

This tool lets you choose Outlook for Mac as your default mail application. Then Outlook opens a new email whenever you click on a mailto: link in an email or website.

Reset Recent Addresses 

This tool lets you reset recent addresses that Outlook has stored, and delete recent addresses all at once, instead of one at a time.

Need more help?

Call support

To report issues or provide feedback, simply go to Help > Contact Support in Outlook for Mac.
For more information, see Contact Support in Outlook 2016 for Mac.

Have a feature request?

Lightbulb - Idea

To suggest new features in Outlook for Mac, go to Help > Suggest a Feature. We’re listening.

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