Like many others, I supported a userVoice entry that asked for IPv6 support in AzureAD Named Locations. After a (very) long time without any further feedback, the latest preview now has support for IPv6 in Named locations.

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The AzureAD Named Locations Preview (Please read the statement in the header):

Here is the IPv6 support:

That really made my day! I do use a lot of IPv6 and I have a partner, who only has IPv6 (His provider doesn’t provide an IPv4 via Dual Stack anymore).

Update:

I did a quick test, the Microsoft Graph API seems to support the new IPv6 address ranges within the Named Locations:

{
	"@odata.type": "#microsoft.graph.ipNamedLocation",
	"id": "ab81cc2e-9cec-4608-8188-05501824cf6f",
	"displayName": "IPV6TEST",
	"modifiedDateTime": "2020-05-23T00:48:56.6479076Z",
	"createdDateTime": null,
	"isTrusted": true,
	"ipRanges": [
		{
			"@odata.type": "#microsoft.graph.iPv6CidrRange",
			"cidrAddress": "2003:a:2651:2123::/64"
		},
		{
			"@odata.type": "#microsoft.graph.iPv6CidrRange",
			"cidrAddress": "2003:a:2651:2100::/64"
		},
		{
			"@odata.type": "#microsoft.graph.iPv6CidrRange",
			"cidrAddress": "2003:a:2651:2121::/64"
		},
		{
			"@odata.type": "#microsoft.graph.iPv6CidrRange",
			"cidrAddress": "2003:a:2651:2122::/64"
		}
	]
}

So instead of #microsoft.graph.iPv4CidrRange you just have to use #microsoft.graph.iPv6CidrRange. That is pretty neat!