Outlook: Troubleshooting

Here are some issues you might see when using Outlook with Microsoft 365 and ways to solve them.

If	Do this
You can’t open Outlook.	Diagnose your error message to fix.
You’re having trouble signing in.	Try one of these options.
You can’t set up Outlook 2010.	You must patch Outlook before using Microsoft 365.
You can’t set up Microsoft 365 on your iOS device.	Check these verification errors.
You can’t use autodiscover or setup wizards.	Try manually setting up Outlook. This won’t work with Office 2016, or if you’re using a Mac.
You’re missing email after moving from Workspace Email to Microsoft 365.	Follow these troubleshooting steps.
You can’t send email on Windows 10.	See this solution from Microsoft.
You can’t send or deliver email and get a bounceback message.	Find your error and its resolution.

More info

• Set up Microsoft 365 email on my phone and computer