Fixes or workarounds for recent issues in Outlook for Mac
Last updated: April 2017
Outlook for Mac crashes and slow performance
Last updated: January 2017
Apple released macOS 10.12 Sierra on 9/20/2016. Some customers are reporting Office 2016 for Mac applications are closing unexpectedly, or crashing when an Office application is launched, or when the computer is moved between Wi-Fi networks (e.g. moving a laptop from home to work).
Customers in a workplace or school network configuration who wish to upgrade to macOS Sierra should update to macOS Sierra 10.12.2 or later, for improved stability specific to proxy networks.
Turning off “Auto Proxy Discovery” or “Automatic Proxy Configuration” is a possible workaround, if allowed by your organization’s network configuration.
Go to System Preferences and open Network.
Click on Advanced and go to Proxies.
Check if "Auto Proxy Discovery" or "Automatic Proxy Configuration" is turned on.
Contact your local network administrator for more information on your network settings.
We will update this content when more information is known, including a fix or additional workaround.
Outlook for Mac issues affecting email message, attachments, and other features
Last updated: March 15, 2017
Users with Outlook for Mac version 15.31 and higher, who have the Cisco WebEx plugin installed, may find that they are unable to reply or respond to any e-mails.
Microsoft & Cisco are working together to resolve this issue as soon as possible. In the meantime, please try to upgrade to the latest version of the WebEx plugin. If this does not resolve the issue, you will need to disable or uninstall the WebEx plug-in to be unblocked.
Last updated: March 7, 2017
If you are running build 15.30, you may be repeatedly prompted for authentication when you're connected to your Office 365 account.
This is fixed in build 15.31.17021600.
When replying to an email message or creating a new one containing an email signature, you receive the following error message:
"Some of the files in this web page are not in the expected location. Do you want to download them anyway? If your sure the Web page is a trusted source, click Yes."
Our engineering team is currently working on a fix for this issue. We'll post back with more information when a fix is released out to our customers.
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