In article <C26ABA0F2E16624EA737DB4674DC05AB167B25F3@mail.baec.local> you write:
Surely Microsoft has IPv6 connectivity? Is there a problem with my dns, or is Microsoft not available over v6?
Looks like it's your DNS. ; <<>> DiG 9.10.2-P2 <<>> www.microsoft.com aaaa ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 16645 ;; flags: qr rd ra; QUERY: 1, ANSWER: 5, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;www.microsoft.com. IN AAAA ;; ANSWER SECTION: www.microsoft.com. 3559 IN CNAME toggle.www.ms.akadns.net. toggle.www.ms.akadns.net. 260 IN CNAME www.microsoft.com-c.edgekey.net. www.microsoft.com-c.edgekey.net. 21560 IN CNAME www.microsoft.com-c.edgekey.net.globalredir.akadns.net. www.microsoft.com-c.edgekey.net.globalredir.akadns.net. 3560 IN CNAME e10088.dspb.akamaiedge.net. e10088.dspb.akamaiedge.net. 9 IN AAAA 2600:1408:10:18f::2768