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Exchange Team Blog
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IPv6 updates for Exchange Online

The_Exchange_Team's avatar
The_Exchange_Team
Icon for Microsoft rankMicrosoft
Oct 30, 2024
Microsoft has recently introduced several key updates to IPv6 traffic for Exchange Online. These updates are designed to enhance security, improve performance, and ensure compliance with modern Inter...
Updated Nov 06, 2024
Version 3.0
announcements
exchange online
Planning and Architecture
security
Tips 'n Tricks
transport
MicroUser1's avatar
MicroUser1
Copper Contributor
Oct 30, 2024

Will IPv6 be enabled for accepted domains with MX records under the DNSSEC enabled mx.microsoft? I get an error when using Get-IPv6StatusForAcceptedDomain for my domain that has an MX record ending in h-v1.mx.microsoft:

 

PS> Get-IPv6StatusForAcceptedDomain -Domain example.com

WARNING: DNS record has unexpected value for domain example.com. Expected: /subscriptions/xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx/resourceGroups/DNSSEC_Resources/providers/Microsoft.Network/dnszones/h-v1.mx.microsoft/CNAME/eop-EUR01-anchor, Actual: /subscriptions/xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx/resourceGroups/dnssec_resources/providers/Microsoft.Network/dnszones/h-v1.mx.microsoft/CNAME/eop-EUR01-v4-anchor.
Result Status AdditionalInfo
------ ------ --------------
Failure Enabled DNS record for the domain example.com has unexpected value.

 

Other accepted domains in my tenant with MX records ending in mail.protection.outlook.com sucessfully shows up as enabled (but no IPv6 addresses are returned for the MX hostname yet).