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Merge pull request #5413 from varuntha-MSFT/patch-9
(AzureCXP) fixes MicrosoftDocs/defender-docs-pr#503518
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defender-office-365/connection-filter-policies-configure.md

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- seo-marvel-apr2020
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description: Admins can learn how to configure connection filtering in Microsoft 365 to allow or block emails from email servers.
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ms.service: defender-office-365
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ms.date: 09/05/2025
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ms.date: 10/30/2025
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appliesto:
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- ✅ <a href="https://learn.microsoft.com/defender-office-365/eop-about" target="_blank">Default email protections for cloud mailboxes</a>
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- ✅ <a href="https://learn.microsoft.com/defender-office-365/mdo-about#defender-for-office-365-plan-1-vs-plan-2-cheat-sheet" target="_blank">Microsoft Defender for Office 365 Plan 1 and Plan 2</a>
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4. Back on the policy details flyout, select **Close**.
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> [!TIP]
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> If the IP address ranges you added don't immediately appear in the connection filter policy, do the following steps:
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>
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> - Try refreshing the portal or verify the changes in Exchange Online PowerShell:
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>
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> ```powershell
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> Get-HostedConnectionFilterPolicy -Identity Default
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> ```
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>
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> - Verify you have the required Microsoft Entra ID permissions as described in the [What do you need to know before you begin?](#what-do-you-need-to-know-before-you-begin) section.
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> If the issue persists, it might indicate a synchronization delay or a service issue.
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## Use the Microsoft Defender portal to view the default connection filter policy
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In the Microsoft Defender portal at <https://security.microsoft.com>, go to **Email & Collaboration** \> **Policies & Rules** \> **Threat policies** \> **Anti-spam** in the **Policies** section. Or, to go directly to the **Anti-spam policies** page, use <https://security.microsoft.com/antispam>.

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