See my problem. I reckon it may be same problem. Apparently a lot of hotmail, accounts are currently affected. Have a look at http://downdetector.com/status/outlook

Ah, thanks for replying. At least it's not just me. Hoping there's some sort of solution soon.

See https://portal.office.com/servicestatus

Title: Can't access or synchronize Outlook.com email

User Impact: Users may be unable to access or synchronize their Outlook.com accounts while using applications or mobile devices.

More info: While we're focused on remediation, users may be able to access the service by logging in to their Outlook.com accounts with a web browser as an alternative method.

Current status: We've completed the fix and are deploying it throughout the affected environment. While the fix is being deployed, some users may begin to access and synchronize their Outlook.com accounts while using applications or mobile devices.

Start time: Thursday, November 17, 2016, at 12:00 AM UTC

Next update by: Wednesday, November 23, 2016, at 8:30 PM UTC

Hi, I'm not sure if there are any further updates. I am still having the same problem. I am using Thunderbird and am just repeatedly asked to re-enter the password for my hotmail account. Even if this can't be fixed, I would really like to be able to access my hotmail messages. Could someone explain how I can do this? I can access Outlook through the web but I'm not sure how to set it up to received my messages - I don't want to move all my emails to Outlook as they are currently all set up for Thunderbird. Is there any other way?

Go to https://outlook.live.com/owa/ and log in to your hotmail account there, using its email address and associated password.

If you have downloaded old messages to Thunderbird then you'll have to look at them in Thunderbird. But new messages, if you leave them in the webmail site, will become available to Thunderbird if/when Microsoft fix their email services.