Cannot create App Service Plan in UK South — "Total VMs: 0" quota error, Microsoft.Web registered

Sayan Dutta 75

I have been unable to create an App Service Plan in UK South.

The deployment fails during preflight validation with the following error:

Code: SubscriptionIsOverQuotaForSku
Operation cannot be completed without additional quota.
Current Limit (Total VMs): 0
Current Usage: 0
Amount required for this deployment (Total VMs): 1
Minimum new limit required: 1

The Azure Quotas page for App Service in UK South currently shows:

Y1 VMs: 0 of 0
Total Regional VMs: 0 of 0

The same ARM template and Y1 configuration deployed successfully in other Azure subscriptions and regions (Australia East, Canada Central, South Africa North etc). Only this UK subscription is experiencing the quota validation failure.

I have few questions like:

Do we need to request an increase for both Y1 VMs and Total Regional VMs, or is increasing the Y1 VM quota sufficient?
What quota values should be requested to deploy one Azure Functions Y1 Consumption App Service Plan?
Is it expected for a subscription to have a default Y1 and total regional App Service VM quota of zero in UK South?
Will increasing these quotas create any additional cost, or will charges apply only after the Function App is deployed and used?
After the quota is approved, can we simply rerun the same ARM template, or are any additional subscription or Microsoft.Web configuration changes required?

Rakesh Mishra 11,100 Reputation points Microsoft External Staff Moderator

2026-07-23T10:33:59.57+00:00

Hi @Sayan Dutta , following up to see if you had a chance to check my previous response and if it was helpful. Please do let me know if you're still facing the issue and need any further assistance on this.
Sayan Dutta 75 Reputation points

2026-07-23T10:39:19.6433333+00:00

Hi @Rakesh Mishra , Thank you for your prompt response for the issue. Yes I saw your response and tried increasing the quota request on Y1 VMs but it failed, so I raised a support request and waiting for some response there

Answer accepted by question author

Rakesh Mishra 11,100 Microsoft External Staff Moderator

Hi @Sayan Dutta ,

Welcome to Microsoft Q&A portal. Thank you for posting your question here.

The SubscriptionIsOverQuotaForSku error you're hitting is the standard App Service regional quota check. Your subscription in UK South currently has 0 App Service worker VMs available for the Y1 (Consumption) SKU, so every Y1 plan deployment fails preflight with Current Limit (Total VMs): 0. The same ARM template works in Australia East / Canada Central / South Africa North because those subscriptions already have non-zero App Service capacity in those regions.

Answering your questions one by one:

1. Y1 VMs vs. Total Regional VMs — do you need to raise both?

Raise the Y1 VMs (per-SKU) quota first. When Azure approves a SKU-level App Service quota increase, the Total Regional VMs aggregate is normally bumped by the same amount automatically, so you usually don't need a separate request. If after approval you see the SKU counter go up but Total Regional VMs is still 0, reply on the same support case and ask for the regional aggregate to be raised as well.

2. What value should you request?

The error states the minimum is 1: Amount required for this deployment (Total VMs): 1 Minimum new limit required: 1

1 will unblock this single deployment. However, Y1 Consumption plans can scale out to 200 instances, so if you expect real traffic, request headroom now (e.g. 10, 50, or 200) to avoid raising another ticket later.

3. Is a default of 0 in UK South expected?

Yes, this is expected. Default App Service quotas depend on subscription age, offer type (PAYG, EA, CSP, MSDN), and prior usage in the region. UK South is currently under noticeable capacity pressure, so new or previously unused subscriptions are frequently created with 0 App Service capacity in this region until a quota request is filed and reviewed.

4. Does raising the quota cost anything?

No. Requesting or being granted an App Service quota increase is free quotas are a limit, not a reservation. You're billed only when the Function App on a Y1 Consumption plan actually executes, based on executions, execution time (GB-s), and memory used. If the plan sits idle, there is no charge.

5. After approval, can you just rerun the ARM template?

Yes. Once the support engineer confirms the new limit is applied (verify on the Quotas → App Service (Public Preview) blade for UK South), redeploy the same ARM / Bicep template with no changes. No additional Microsoft.Web re-registration or subscription-level settings are needed — you've already confirmed the resource provider is registered, which is the other common cause of this error.

How to file the request

Azure portal → Quotas
Select App Service (Public Preview) from the service list.
Use the Region filter at the top → select UK South.
Locate the Y1 VMs row → click the edit (pencil) icon → enter your New Limit (1 for a single plan, higher for headroom) → Submit.
Wait for approval (typically minutes to a few hours).
If it fails, Create Support Request button will appear. Click on it and fill the details to create a request.

Steps to create support request: recommended for UK South right now, since the self-service flow is often routed to manual review in capacity-constrained regions:

Azure portal → Help + support → Create a support request.
Issue type: Service and subscription limits (quotas)
Quota type: Web App (Windows and Linux), this is the correct type for Function Consumption plans too.
Provide:
- Region: UK South
- SKU: Y1 (Dynamic)
- New limit: your desired number of worker VMs
Paste the exact error message in the description.

Recommendation

Y1 Consumption is now the legacy hosting model for Azure Functions (Linux Consumption has already been retired). Microsoft's current recommendation for new Function Apps is the Flex Consumption (FC1) plan, and it has its own quota surface (often easier to approve in capacity-constrained regions), better cold-start / scale characteristics, and full VNet integration. If your workload allows, consider deploying on Flex Consumption in UK South (or UK West as a nearby alternative).

References

Please let me know if you have any other questions.

Rakesh Mishra 11,100 Reputation points Microsoft External Staff Moderator

2026-07-26T14:02:21.7866667+00:00

Hi @Sayan Dutta , following up to check if quota issue is resolved. Please do let me know if you have any further question.

Please accept the answer if you found it helpful. It may help other community members.
Sayan Dutta 75 Reputation points

2026-07-27T10:54:18.6266667+00:00

Hi @Rakesh Mishra , The quota issue is not resolved yet. I got a response from Microsoft support as the quota request for the Y1 Function/Web App plan in UK South cannot currently be approved because of regional capacity constraints.

I hope we can transfer the deployment to UK West
Rakesh Mishra 11,100 Reputation points Microsoft External Staff Moderator

2026-07-27T13:21:59.1266667+00:00
Hi Sayan, Thanks for the update. That response is consistent with UK South being capacity constrained. Moving to UK West is a sensible path and keeps data resident in the UK, since UK West is the paired region for UK South. A few points before you redeploy:

Check quota in UK West first. Do not assume it is non-zero. Go to Quotas > App Service (Public Preview), filter to UK West, and confirm the Y1 VMs row is above 0. Or run: az appservice list-locations --sku Y1 --output table. If it shows 0, raise the request first. UK West is not under the same capacity pressure, so approval should be quick.

App Service and Functions resources cannot be moved between regions. There is no region-move operation, so you will need to redeploy the same ARM template with location set to ukwest and create fresh resources. Plan for: the function app name must change, as app names are globally unique across azurewebsites.net, so clients calling HTTP endpoints will need the new URL; a new storage account in UK West; plus in-region Application Insights, app settings, managed identities, VNet integration; and repointing your CI/CD pipeline to the new app.

On availability zones. UK West has no availability zones, unlike UK South which has three. However, this only matters if zone redundancy is actually a requirement, and zone redundancy is not available on the Y1 Consumption plan in any region. It requires Premium v3, Isolated v2, or Flex Consumption with a minimum of three instances. So if you stay on Y1, the lack of zones in UK West makes no practical difference. If zone redundancy is a genuine requirement, there is no UK alternative today, and the nearest zone-enabled regions are North Europe (Ireland), France Central, Belgium Central, or Germany West Central. West Europe is zone-enabled but currently capacity constrained, so I would avoid it for a fresh deployment. Please confirm data residency and compliance requirements before considering any region outside the UK.

Consider Flex Consumption instead of Y1. Since you are rebuilding anyway, this is a good time to evaluate the Flex Consumption (FC1) plan. It is the recommended serverless hosting plan for Functions, uses a separate quota model based on memory rather than worker VM counts, and so is unaffected by the App Service VM capacity constraints. It scales to 1,000 instances instead of 200 and supports VNet integration. The main caveat is that it is Linux only.

References:

Relocate your Azure Functions app to another region

Relocate Azure App Services to another region

Azure Functions Flex Consumption plan

Please let me know if you have any further questions.

Answer accepted by question author

TP 161K Volunteer Moderator

Hi,

For UK South, request Y1 VMs quota by clicking on pencil icon. The quantity you request depends on how many instances you think your function may need to scale out. Total Regional VMs will increase automatically.

Assuming the automated mechanism approves your request you should have no issues deploying Y1 to UK South. You may re-run the same template.

Please click Accept Answer and upvote if the above was helpful.

Thanks.

-TP

Sayan Dutta 75 Reputation points

2026-07-21T14:30:44.8333333+00:00

Hi @TP

Thanks for your quick response. I wanted to know one thing, Is it expected for a subscription to have a default Y1 and total regional App Service VM quota of zero in UK South and Will increasing these quotas create any additional cost ?
TP 161K Reputation points Volunteer Moderator

2026-07-21T14:35:49.7933333+00:00

Increasing quota doesn't cost anything. Due to capacity limitations as well as the new App Service quota system, yes, it is common for people to see 0 quotas in various regions, not just UK South.

Please request quota increase and reply back with your results.

Thank you.
TP 161K Reputation points Volunteer Moderator

2026-07-23T12:04:45.8+00:00

@Sayan Dutta Hopefully they will approve your Y1 quota request for UK South. Several people have been having capacity issues there lately so it is possible they will deny it.
Sayan Dutta 75 Reputation points

2026-07-23T12:18:31.4266667+00:00

@TP , I hope so too, but just in case if they reject, is it possible that I move my resources to UK West location? Will App Service Plan work well in UK West?
TP 161K Reputation points Volunteer Moderator

2026-07-27T07:38:11.02+00:00

Yes, assuming there is capacity available, App Service Plan should work fine in UK West.

1 additional answer

AI answer

2026-07-21T13:13:56.17+00:00
For this error, the blocking quota is the App Service quota in the target region. The accepted Microsoft guidance for the same SubscriptionIsOverQuotaForSku / Total VMs: 0 scenario is to go to Quotas in the Azure portal, select App Service (Public Preview), filter to UK South, and request an increase for the specific App Service quota shown for the SKU being deployed. For App Service and Functions quota requests, the support flow also uses Quota type: Function or Web App (Windows and Linux) and asks for Region, App Service plan SKU, and New limit of worker VMs.

Based on that:

Y1 VMs vs Total Regional VMs Request the App Service quota increase for the specific SKU being deployed in UK South. In the quota/support flows, the request is made against the App Service/Function or Web App quota for the plan SKU and worker VMs. The context does not state that a separate manual request for both values is always required.

Quota value to request for one Y1 deployment The deployment error states:

Current Limit (Total VMs): 0

Amount required for this deployment: 1

Minimum new limit required: 1

So the minimum supported request to deploy one plan is 1.

Is zero default quota expected? Yes, this can occur. The context states that default quotas depend on factors such as the age and type of the subscription and service usage. Microsoft Q&A examples for App Service also show subscriptions with 0 App Service quota in a region and recommend requesting a quota increase.

Does increasing quota create cost? The context does not state that requesting or approving a quota increase itself creates charges. It does state that App Service plans define resource limits and that pricing applies to plans such as Dedicated/App Service plans at standard rates. No supported statement is available here that quota approval alone incurs cost.

After approval, can the same ARM template be rerun? Yes. The accepted Microsoft guidance for this scenario is that once the quota request is approved, the deployment can be tried again. No additional Microsoft.Web registration change is indicated when Microsoft.Web is already registered.

If the quota blade does not allow the request directly, use Support + Troubleshooting in the Azure portal:

Search for quota limit.

Select Service and subscription limits (quotas).

Select Create a support request.

Set What is your issue related to? = Azure services.

Set Issue type = Service and subscription limits (quotas).

Select the subscription.

For App Service/Functions quota requests, provide Region, App Service plan SKU, and New limit of worker VMs.

References:

Frequently asked questions about creating or deleting resources in Azure App Service

Manage quota for Microsoft Dev Box resources

Azure Quota Service API

Azure App Service quotas and metrics

Azure subscription and service limits, quotas, and constraints

Quotas for Azure Container Apps

Cannot create App Service Plan in UK South — "Total VMs: 0" quota error, Microsoft.Web registered - Microsoft Q&A

How do you request increase in quota? - Microsoft Q&A
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