Error Code: DeploymentFailed

Question

Error Code: DeploymentFailed

Kevin Wong 50

Message: At least one resource deployment operation failed. Please list deployment operations for details. Please see https://aka.ms/arm-deployment-operations for usage details.

Detail: Allocation failed. We do not have sufficient capacity for the requested VM size in this region. Read more about improving likelihood of allocation success at http://aka.ms/allocation-guidance

Having this issue for the past 2 hours. Any help is appreciated.

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Answer 1

Jilakara Hemalatha 10,365 Microsoft External Staff Moderator

Hello Kevin,

Thank you for posting your question on the Microsoft Q&A forum.

The error you are encountering — DeploymentFailed with AllocationFailed — occurs when Azure does not have sufficient available capacity for the requested VM size in the selected region at that time. This can happen during deployments of Azure Cloud Services when there is a temporary demand spike for specific SKUs, and the required compute resources are not immediately available. This behavior is related to regional capacity constraints and does not indicate an issue with your template or configuration.

Recommended approaches / workarounds:

Try the deployment again after some time, as capacity is dynamic and may become available.

Check for the quota details from the subscription.

Try deploying to a different region if your workload allows, since the requested VM size may currently be constrained only in the selected region.

Switch to a compatible VM SKU or alternate size to improve the likelihood of allocation success, as different SKUs may be backed by different hardware clusters.

https://learn.microsoft.com/en-us/troubleshoot/azure/virtual-machines/windows/allocation-failure

Hope this helps! Please let me know if you have any queries in comments

Kevin Wong 50 Reputation points

2026-02-12T11:58:11.4+00:00

Not an option. In order to swap instances, need to be in same region
Jilakara Hemalatha 10,365 Reputation points Microsoft External Staff Moderator

2026-02-12T12:06:54.1366667+00:00

Since the deployment must remain in the same region, this indicates a temporary capacity constraint for the requested VM size in that region.

If feasible, you may also try deploying with an alternate VM size within the same region, as different sizes can be placed on different hardware clusters even when one specific SKU is constrained.
Kevin Wong 50 Reputation points

2026-02-12T12:11:04.15+00:00

After retrying for more than 2 hours, the deployment is successful now.
Jilakara Hemalatha 10,365 Reputation points Microsoft External Staff Moderator

2026-02-12T12:12:25.87+00:00

Thanks for update kevin.

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Error Code: DeploymentFailed

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