Published Jul 3, 2025
Exchange Online PowerShell cmdlets will update certain database property formats starting October 2025 to improve performance and consistency. The change affects only Exchange Online, not on-premises. No action is required, but review scripts parsing these values for compatibility.
Updated August 21, 2025: We have updated the timeline. Thank you for your patience.
We're updating the output format of certain properties returned by Exchange Online PowerShell cmdlets to improve performance and align with backend service optimizations. This change reduces unnecessary data retrieval and enhances consistency across services.
When this will happen:
Rollout will begin in October 2025 (previously August) and complete by November 2025.
How this affects your organization:
This update changes the string format of specific properties returned by Exchange Online cmdlets. For example, the Database property in the output of Get-Mailbox will change from:
Database : APCP153DG038-db080
to:
Database : APCP153.PROD.OUTLOOK.COM/7ad9dea1-26b7-4088-ad73-708c219faff6
This change applies only to Exchange Online. On-premises Exchange environments are not affected.
We do not expect organizations to have dependencies on these output formats. These values are informational only and not intended for admin control or automation. No changes to user workflows, admin configurations, or help desk processes are expected.
What you can do to prepare:
No action is required. There are no settings or controls to manage this change. If you have scripts that parse these property values, we recommend reviewing them to ensure compatibility.