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MC1214183 Stay informedUpdated messageAdmin impact

Purview Communication Compliance: Temporary delays in processing due to planned infrastructure migration

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

Schedule dates changed in the text

Date phrases in schedule sentences differ between the versions this installation saw
  • Seen 15 May 2026 April 30, 2026, May 15, 2026 → June 15, 2026
  • Seen 30 Apr 2026 May 15, 2026
  • Seen 14 Apr 2026 April 15, 2026 → April 30, 2026
  • Seen 6 Mar 2026 February 28, 2026 → April 15, 2026

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 May 15, 2026: We have updated the timeline. Thank you for your patience. Introduction Microsoft Purview Communication Compliance is undergoing an infrastructure upgrade from January 5 to June 15, 2026, causing temporary processing delays, intermittent errors, and possible outdated report data. Although this migration is planned outside of normal business hours, some production clusters may experience higher loads, potentially causing brief delays in downstream processing. Brief delays in processing may occur during this migration, but no data will be lost. No action is required, but admins should inform teams about these short-term impacts. When this will happen: This migration will begin January 5, 2026, and end June 15, 2026 (previously May 15). How this affects your organization: Who is affected:Admins managing Microsoft Purview Communication Compliance policies and review workflows. What will happen: Updates to policy insights and aggregated counts (New pending today, Total pending, Total resolved) may occur at a slower pace than usual. Intermittent errors may occur when reviewing flagged messages. Brief delays may be observed between receiving an alert notification and accessing messages for review. Certain report views may display outdated data until backlog processing is complete. Some export functions, such as exporting reports and files, might be temporarily unavailable. No data loss will occur—only temporary slowdowns in processing times. Users may experience reduced responsiveness and intermittent instability in the experience. This maintenance is scheduled outside of normal business hours to minimize impact. However, global organizations may experience some overlap with active hours. What you can do to prepare: No action is required from administrators; the upgrade will be implemented automatically. We recommend informing your administrative and compliance teams about these possible short-term delays. If needed, update internal documentation to reflect potential temporary limitations. Learn about Communication Compliance. Compliance considerations: No compliance considerations identified; review as appropriate for your organization.

What changed

Between archive captures, newest first

  1. Updated April 30,May 15, 2026: We have updated the timing of this change below. timeline. Thank you for your patience. Introduction Microsoft Purview Communication Compliance is undergoing an infrastructure upgrade from January 5 to April 30,June 15, 2026, causing temporary processing delays, intermittent errors, and possible outdated report data. … this will happen: This migration will begin January 5, 2026, and end MayJune 15, 2026 (previously April 30).May 15). How this affects your organization: Who is affected:Admins managing Microsoft Purview Communication …

  2. Updated April 14,30, 2026: We have updated the timing of this change below. Thank you … this will happen: This migration will begin January 5, 2026, and end April 30,May 15, 2026 (previously April 15).30). How this affects your organization: Who is affected:Admins managing Microsoft Purview Communication …

  3. … this will happen: This migration will begin January 5, 2026, and end  April 30, 2026 (previously April 15, 2026).15). How this affects your organization: Who is affected:Admins managing Microsoft Purview Communication …

  4. Updated March 4,April 14, 2026: We have updated the timing of this change below. Thank you for your patience. Introduction Microsoft Purview Communication Compliance is undergoing a scheduled infrastructure upgrade.an infrastructure upgrade from January 5 to April 30, 2026, causing temporary processing delays, intermittent errors, and possible outdated report data. Although this migration is planned outside of normal business hours, some production … processing may occur during this migration, but no data will be lost. No action is required, but admins should inform teams about these short-term impacts. When this will happen: This migration will begin January 5, 2026, and end April 15,30, 2026 (Previously February 28,(previously April 15, 2026). How this affects your organization: Who is affected:Admins managing Microsoft Purview … temporarily unavailable. No data loss will occur—only temporary slowdowns in processing times. Users may experience reduced responsiveness and intermittent instability in the experience. This maintenance is scheduled outside of normal business hours to minimize impact. …

    • Tags Admin impact → Updated message, Admin impact

    Updated March 4, 2026: We have updated the timing of this change below. Thank you for your patience. Introduction Microsoft Purview Communication Compliance is undergoing a scheduled infrastructure upgrade. Although … data will be lost. When this will happen: This migration will begin  January 5, 2026, and end April 15, 2026 (Previously February 28, 2026.2026). How this affects your organization: Who is affected:Admins managing Microsoft Purview Communication …

  6. · first version seen

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