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MC1060467 Prevent or fix issuesUpdated messageAdmin impact

Action Required - Microsoft Defender for Cloud Apps Network Configurations Changes

Microsoft 365 Message Center Archive by Merill Fernando · Microsoft may not have sent this notice to your tenant.
Microsoft Defender XDR
Microsoft 365 admin center

Microsoft asks admins to prevent or fix an issue. Read what it asks below and check the linked documentation; whether your tenant is affected is not known here.

Schedule dates changed in the text

Date phrases in schedule sentences differ between the versions this installation saw
  • Seen 30 Apr 2025 June 1, 2025
  • Seen 30 Apr 2025 May 1st, 2025 → June 1, 2025

Read from date phrases in Microsoft's text, not from notice metadata. A changed phrase can be a moved rollout, a new milestone or just rewording; "What changed" below shows which.

What the notice says

Microsoft’s text, with source markup removed
Updated April 30, 2025: We are in the process of reviewing this change and will update the Message center post once we are ready to proceed. Please ignore the Message center post till further notice. Thank you for your patience. Due to ongoing work on Microsoft Defender for Cloud Apps aimed at improving security and performance, you are required to update network information in your system's firewall and additional third-party services by the dates noted below. When this will happen: We will communicate via Message center when we are ready to proceed. How this affects your organization: You are receiving this message because our reporting indicates your organization may be using Microsoft Defender for Cloud Apps. Administrators may no longer be able to be able to see the Organization logo on M365 portal in the overview page. when this change is implemented. What you need to do to prepare: Please update your firewall rules to allow below endpoints by: We will communicate via Message center when we are ready to proceed. discoveryresources-cdn-prod.cloudappsecurity.com discoveryresources-cdn-gov.cloudappsecurity.us  All required outbound access URLs can also be found in Network requirements under "Portal Access"

What changed

Between archive captures, newest first

  1. … will update the Message center post once we are ready to proceed. Please ignore the Message center post till further notice. Thank you for your patience. Due to ongoing work on Microsoft Defender …

  2. Updated April 30, 2025: We have updatedare in the process of reviewing this change and will update the timeline below.Message center post once we are ready to proceed. Thank you for your patience. Due to ongoing work on Microsoft Defender … additional third-party services by the dates noted below. When this will happen: Please follow these instructions by June 1, 2025 (previously May 1st) We will communicate via Message center when we are ready to ensure uninterrupted access to our services. proceed. How this affects your organization: You are receiving this message because our … do to prepare: Please update your firewall rules to allow below endpoints by June 1, 2025 (previously May 1st).by: We will communicate via Message center when we are ready to proceed. discoveryresources-cdn-prod.cloudappsecurity.com discoveryresources-cdn-gov.cloudappsecurity.us  All required outbound access URLs can also be found in …

    • Tags Admin impact → Updated message, Admin impact

    Updated April 30, 2025: We have updated the timeline below. Thank you for your patience. Due to ongoing work on Microsoft Defender for Cloud Apps aimed at … dates noted below. When this will happen: Please follow these instructions by June 1, 2025 (previously May 1st, 2025, 1st) to ensure uninterrupted access to our services. How this affects your organization: … do to prepare: Please update your firewall rules to allow below endpoints beforeby June 1, 2025 (previously May 1st,20251st). discoveryresources-cdn-prod.cloudappsecurity.com discoveryresources-cdn-gov.cloudappsecurity.us  All required outbound access URLs can also be found in …

  4. · first version seen

Linked documentation

Microsoft pages the notice links to

The notice links to no Microsoft Learn or Support page that this installation reads.

No related evidence found in this installation's recent collection. This does not establish that no announcement exists.

Not confirmed here

What this page cannot tell you
  • Whether your tenant is affected: this is Microsoft's notice, not a check of your settings.
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