Hi Andrew Norman
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- Dissociate the IP: You'll need to disassociate the public IP from the VPN gateway. This is essential because the dynamic IP settings tied to a gateway resource, can restrict changes.
- Change IP to Static: Once the IP is dissociated, you can change it from Dynamic to Static.
- Upgrade to Standard SKU: After setting the IP to Static, you should have the upgrade option available to transition it from Basic to Standard.
- Reassociate the IP: Finally, you can reassociate the newly upgraded Static public IP back to your VPN gateway.
Please refer the link for upgrade: https://free.blessedness.top/en-us/azure/vpn-gateway/basic-public-ip-migrate-about
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Kindly let us know if you have any additional questions.
Thanks