The last outage for Outlook came in June when we quipped that Microsoft is so keen for users to migrate to the New Outlook email client that it appeared to have broken Classic Outlook… again. On that occasion, the reported issues emerged on virtual desktop infrastructure.

Microsoft Outlook appeared to crash on Thursday, leaving lots of people scrambling as the work day began in the United States. Reports of issues spiked on Down Detector around the early East Coast hours.

Now, another issue has cropped up: Outlook is crashing when many different emails are opened at once. Microsoft is aware of both problems and currently working on permanent fixes for both.

If your classic Outlook application crashes when you forward, write or reply to an email, you can temporarily fix this issue with a few simple steps.

Outlook has over 400 million active users around the world. This issue seems to be affecting both personal and work Outlook accounts, as well as Hotmail accounts. Hotmail is also owned by Microsoft. Some users are seeing a message saying that their license is not valid, while others are seeing a message that says, "Something went wrong."