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Ray Allen (US) 0 Reputation points

I have a user that is getting this error when they try to open an excel file in Teams. They can open the file in the desktop app but when trying to open within Teams they are getting this error.

Microsoft Teams
Microsoft Teams
A Microsoft customizable chat-based workspace.
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  1. LiweiTian-MSFT 11,450 Reputation points Microsoft Vendor

    Hi @Ray Allen (US)

    Do you default to opening in the browser when you open files in Teams?

    According to research, the issue may be due to an updated list of potentially malicious IP addresses obtained by the Web Application Firewall (WAF) to protect Microsoft 365 for the web.

    Microsoft will fix this issue in the near future.

    We recommend that you use the desktop client to open the file in the near future. If you are in Teams, please click the three-dot logo on the left side of the file and click the Open option and then select Open in app.

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  2. Ray Allen (US) 0 Reputation points

    It's happening users select Edit in Teams.

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