Error 500, system.loadtypeexception logging into Hotmail from 2 web browsers

Question

When I login to Microsoft-hosted Hotmail from 2 browsers I get error 500. Outlook for Android works fine with the same account.

Answer 1

Hi @scott zimmerman ,

This seems to be an issue that started happening recently. Microsoft is investing this issue. And it should be fixed soon. So give it some time and try again.

You can check the Service health in M365 admin center for more information:

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Answer 2

Check this thread - https://answers.microsoft.com/en-us/outlook_com/forum/all/error-trying-to-open-hotmail-or-outlook-account-in/e4625840-b58e-4c46-a6c4-c4a7b62b0c54