Default Internet outbound access for Simplified node communication Batch pools without public IP addresses will be retired on 30 September 2025

In Azure, VMs that are created in a virtual network without a defined explicit outbound method are assigned a default public IP address that enables internet connectivity. On 30 September 2025, [default outbound access connectivity for VMs in Azure will be retired](https://azure.microsoft.com/updates/default-outbound-access-for-vms-in-azure-will-be-retired-transition-to-a-new-method-of-internet-access/). You may be relying on this default outbound access for Batch pools created with [Simplified compute node communication without public IP addresses](https://learn.microsoft.com/azure/batch/simplified-node-communication-pool-no-public-ip). If you have already configured an explicit outbound access mechanism for these Batch pools, you may ignore this notice. From now until 30 September 2025, you can continue to use your simplified compute node communication Batch pools without public IP addresses with default Internet outbound access. After that date, if you rely on this mechanism for outbound access, your Batch pools, compute nodes, jobs and tasks may stop working after that date. **Required action** If you are currently relying on default Internet outbound access, you will need to add an [explicit outbound access mechanism](https://learn.microsoft.com/azure/batch/simplified-node-communication-pool-no-public-ip#outbound-access-to-the-internet) for your Batch pools without public IP addresses before 30 September 2025\. **Help and support** If you have questions, get answers from community experts in [Microsoft Q&A](https://aka.ms/batchmicrosoftqna). If you have a support plan and you need technical help, create a [support request](https://ms.portal.azure.com/#view/Microsoft%5FAzure%5FSupport/NewSupportRequestV3Blade/assetId//callerWorkflowId/f6a02686-b85b-461a-bed1-4f662da46ee1/callerName/Microsoft%5FAzure%5FSupport%2FHelpPane.ReactView/subscriptionId//productId//summary/CycleCloud/topicId//issueType/technical). * Retirements