Need Clarification on Azure Planned Scheduled Maintenance

Question

Hi Support,

We received a planned maintenance notification from Azure. Upon checking the Azure Portal, only 1 VM is listed, while we have a lot of VMs.

Could you please confirm if the maintenance will impact only the listed VM or all VMs?

TRACKING ID: BSX3-RVG

Kindly advise.

Thanks in advance.

Answer 1

The planned maintenance notification you received from Azure will only impact the VM that is listed in the Azure Portal. If you see only one VM listed, it means that only that specific VM is scheduled for maintenance. Other VMs that are not listed are not affected by this maintenance wave.

If you do not see any maintenance information for your other VMs, it could be that they are hosted on updated servers or that they are not part of the current maintenance wave.

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References:

• Handling planned maintenance notifications
• Handling planned maintenance notifications using the portal

Answer 2

Hello @Dinesh Kumar

Thank you for reaching out with your query regarding the planned maintenance notification.

1.Why only 1 VM listed in Maintenance :

Azure planned (scheduled) maintenance is host‑level or platform‑level, not subscription‑wide. This means:

• Maintenance is scheduled only for the specific physical host (or host cluster) that requires updates.
• Only the virtual machines currently running on the affected host are listed in the maintenance notification.
• If you have multiple VMs, but only one VM appears, it indicates that only that VM is placed on the host undergoing maintenance.
• Other VMs are running on different infrastructure and are not impacted by this maintenance cycle.

Will This Maintenance impact only listed VM or all the VM's : Only the Listed VM will be impacted.

The maintenance will not affect other VMs in the subscription unless they are explicitly included in the maintenance notification.

Azure does not perform blanket maintenance on all VMs at once—this design helps minimize customer impact.

2.What Kind of impact can occur during the planned maintenance:
Depending on the maintenance type, one of the following may occur only for the listed VM:

• A brief VM reboot
• Temporary pause and resume
• Short connectivity interruption

Azure always tries to use live migration where possible. A reboot is required only if live migration is not supported for that maintenance activity.

3.How can you validate whether other VMs are affected:

• Checking Azure Portal → Service Health → Planned Maintenance
• Reviewing per‑VM maintenance notifications If other VMs are impacted, they will appear individually under planned maintenance.

4.Recommendations :

• Ensure Azure Backup is enabled for critical VMs.
• For high availability workloads, use:
  • Availability Sets
  • Availability Zones
• Subscribe to Service Health alerts so you are proactively notified of maintenance events.

Thanks,
Manish Deshpande.

Answer 3

Hello @Dinesh Kumar,

Thanks for using Q and A forum.

The maintenance notification you received may impact only the VM listed in the Azure Portal. Azure provides a self-service window during which you can check which virtual machines are affected by the planned maintenance.

Double-Check

1. Go to Azure Portal
2. Navigate to Service Health → Planned Maintenance
3. Open tracking ID BSX3-RVG Review: Impacted resources

Region

Maintenance window

Impact type (Reboot / Freeze / Live migration)

If additional VMs were affected, they would all be listed there.

However, it’s important to monitor Azure Service Health for any updates regarding maintenance notifications for your entire subscription

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