Policy Changes - Edit protection settings (Anti-phishing)

sarah B 0 Reputation points
2026-10-23T10:53:58.5766667+00:00

I am a Global Administrator on a Microsoft 365 account.

When I'm trying to change my Ant phishing policy :
enabled user impersonation --> add trusted sender --> apply quarantine action --> enabled notification apply notification policy

I received the following error

Client Error An error occurred when updating the policy. Please try it later.

How can I fix it ?

Microsoft Security | Microsoft Defender | Microsoft Defender for Office 365
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  1. Vasil Michev 128.6K Reputation points MVP Volunteer Moderator
    2026-10-23T12:06:26.43+00:00

    To exclude any potential issues on the frontend, try performing the action via a different browser and preferably, in a private session. If you are still facing the same issue, you can try making the changes via PowerShell instead. The set of *-AntiPhishPolicy and *-AntiPhishRule cmdlets are responsible for managing anti=phishing policies, for the exact syntax needed consult the documentation, or capture the network output when performing the change in the portal.

    And if you are facing issues with PowerShell also, best open a support case.

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