MC1455035: Power Pages Rolls Out Early Upgrade to Version 9.8.8.5 with Performance and Security Fixes

MWPRO IMPACT SCORE
OPERATIONAL IMPACT
30
0 25 50 75 100
MODERATE IMPACT • ASSESS BUSINESS IMPACT
Recommended Action:
Take a look and decide whether this affects your tenant, users or support teams.
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Primary Audience

Power Platform AdminsIT ManagersService Owners
Why this score?
AI Confidence
HIGH
Enough detail is available to trust this assessment.
Assessment Reasoning
The upgrade is automatic and part of a scheduled early release. Admins may need to monitor site availability and inform stakeholders about a brief read-only period and a website restart. This is mainly operational awareness with minimal effort, as no manual action or configuration changes are required.
30
🛡️ Admin Impact
20
👥 User Impact
40
Urgency
20
🔧 Effort
ℹ️ WHAT YOU NEED TO KNOW
📌

AT A GLANCE

Power Pages sites marked for early upgrade are moving to version 9.8.8.5 with fixes and security updates. Expect a short read-only period and one site restart during the upgrade window.
👥

END USERS

Users may notice a brief read-only period and a restart of the Power Pages site.
🛡️

IT ADMINS

No immediate admin action required.
📅

ROLLOUT TIMELINE

Start:
15 August 2026

📢 Official Microsoft Message Center Announcement


Power Pages – Power Pages version 9.8.8.5 Early Upgrade Release
Message ID: MC1455035
Maintenance window start: August 15, 2026, at 6:00 PM UTC
Maintenance window end: August 16, 2026, at 3:00 AM UTC

This is the early upgrade deployment of Power Pages version 9.8.8.5 for Microsoft Dynamics 365. This deployment includes an updated website host and no solution update. This release contains fixes for issues reported by customers as well as performance and security updates. Release notes for this release can be viewed here.

How does this affect me?
This release will be applied to your Power Pages website(s) marked for early upgrade. During the update, the Portal Management page in the Power Platform admin center will be placed in a read-only state for a short period of time. Additionally, your Power Pages website(s) will be restarted once during this upgrade.

What action do I need to take?
Upgrade of the website(s) to the newest version will be applied automatically. No action is required.

Learn more about the Power Pages upgrade process.

Source: Microsoft Message Center • Analysed by MWPro

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