The core count limit for family standardMSFamily in the location uksouth was reached. Maximum limit: 0. Attempted: 8.

Hello Adrian, it looks like your Site Recovery test‐failover is failing because your Azure subscription has 0 cores allocated for the Standard MS VM family in UK South (so when ASR spins up an 8-core test VM, it hits the “core count limit” right away).

Here’s how you can resolve it:

1. Verify your current quota • Sign in to the Azure portal and go to Subscriptions. • Select your subscription, then open Usage + quotas (from the left menu). • Filter by Microsoft.Compute and by the UK South region. • Locate the “Standard MS family (vCPUs)” quota – you’ll see Current Usage = 0 and Limit = 0.
2. Request a quota increase A. From Usage + quotas
   1. Click the pencil icon next to the Standard MS family quota.
   2. Enter a new limit (for example, 8 or higher to cover your failover needs).
   3. Click Save and continue to submit.
   B. Or via Help + support
   1. Create a new support request: Issue type = Service and subscription limits (quotas).
   2. Quota type = Compute – VM (cores-vCPUs).
   3. Choose UK South and the Standard MS family, then request the number of cores you need.
   4. Complete the wizard to submit your request.
3. Wait for approval • Quota requests usually get approved in minutes, but complex increases can take longer. • Once approved, retry your test failover – ASR should be able to spin up the VM.
4. If you’re on a Free Trial subscription • Free Trial can’t be increased. You’ll need to upgrade to Pay-As-You-Go or another paid offer before you can bump your core quotas.

Hope that gets you back on track! Let me know if you run into any hiccups.

Reference

• “ST- Compute-VM (cores ‑ vCPUs) subscription limit increases” – how to view & raise vCPU quotas

• “Resolve 28075 error in Microsoft.RecoveryServices…” – ASR test/failover core-limit troubleshooting

Hope this helps. If the information was useful, please consider accepting the answer and upvoting. Feel free to reach out if you need any further assistance. Thank you.

Hi Adrian,

Please navigate to Quotas in Azure portal using link below:

https://portal.azure.com/#view/Microsoft_Azure_Capacity/QuotaMenuBlade/~/myQuotas

Next click on Region filter at top and set to UK South, enter ms family in search box, then click pencil icon to the right of Standard MS Family vCPUs, enter requested vCPUs, click Submit. Based on your error you need at least 8, but perhaps you need more for other VMs.

NOTE: You may also need to request increase of Total Regional vCPUs for UK South depending on your usage.

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

Thanks.

-TP