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."

Microsoft has fixed a bug that caused Outlook (classic) to crash when opening emails or starting a new message. The solution to the problem is available

If your classic Outlook application crashes when you forward, ... Microsoft has promised a permanent fix for this bug, and classic Outlook users will be able to access this update by January 28, ...

The fix is also expected to reach Outlook 2016 on July 1 and Outlook 2019 on July 8. To see which version you're running, select the File menu in Outlook and click Office Account.

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Microsoft admits bug with blue screen crashes, and has rushed out a fix Windows 10’s latest update packs a nasty bug, and while your system might be safe, it’s vital you check now Latest in Pro

Software Apps Outlook Classic bug spikes CPU usage to 50% while typing — but there's a temporary fix. ... Microsoft Outlook for Windows is crashing on startup for users everywhere.

This is not a problem with the Outlook installation, but rather a bug that occurs when you install the latest version of Outlook on Windows 10 v2004. Microsoft is expected to release a fix soon.