Troubleshooting

See a list of Outlook known issues

Fix Outlook and Office 365 problems with the Support and Recovery Assistant for Office 365

How to sign in to or out of Outlook.com

Unblock my Outlook.com account

Something went wrong adding Gmail to Outlook

I can't start Outlook or it gives me an error that says “Cannot start Microsoft Office Outlook. Cannot open the Outlook Window”

The Outlook program freezes, stops working, or hangs

My sent messages are stuck in the Outbox

Other people aren't receiving my messages

Fix Outlook.com email sync issues