Azure DNS
An Azure service that enables hosting Domain Name System (DNS) domains in Azure.
Got my query resolved. My domain was present in domain manager portal.
unable to find cname sdx.microsoft.com for your service
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Varkha Kundal
60
Reputation points Microsoft Employee
we have a requirement to change cname destination for sdx.microsoft.com which is under microsoft zone. how can i change it. i cant see that in our existing record set.
Azure DNS
3 answers
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Varkha Kundal 60 Reputation points Microsoft Employee
2026-06-22T08:52:45.3566667+00:00 -
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Thanmayi Godithi 10,820 Reputation points Microsoft External Staff Moderator2026-06-16T11:18:34.12+00:00 Hi Varkha Kundal ,
Thank you for reaching out on Microsoft Q&A forum.
To better understand the scenario, could you please confirm the following:
- Is
sdx.microsoft.coma domain/subdomain managed within your DNS zone, or is it part of the Microsoft-ownedmicrosoft.comnamespace?
This will help us determine the next steps.
- If the record is part of a DNS zone owned and managed by your organisation, you should be able to view and modify the CNAME record within your DNS provider.
- However, if the record belongs to the Microsoft-owned
microsoft.comzone, it will:- Not appear in your DNS record sets
- Not be editable from your side
- Not appear in your DNS record sets
As per Microsoft Learn:
- DNS records can only be managed within the DNS zone you control
Manage DNS record sets in Azure DNS - Control over DNS records depends on domain ownership and delegation
DNS zones and records overview
- Is
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AI answer
2026-06-16T11:02:34.8133333+00:00 The CNAME record for
sdx.microsoft.comis in a DNS zone owned and managed by Microsoft. A CNAME in themicrosoft.comzone can only be created or modified in the authoritative DNS zone formicrosoft.com, which is under Microsoft’s control.Because of this, it cannot be changed from:
- Azure DNS zones in a customer subscription, or
- Any external registrar or DNS provider used for your own domains.
To point a service to a different destination, use one of these approaches instead:
- If the requirement is to change where your custom hostname resolves, create or update a CNAME in the DNS zone you control (for example, in Azure DNS or your registrar) so that your hostname (e.g.,
app.contoso.com) points to the new target, rather than trying to modifysdx.microsoft.com. - If a Microsoft service explicitly requires
sdx.microsoft.comand the behavior is incorrect, this is a platform-side configuration and must be handled by Microsoft support for that product. Open a support ticket for the specific Azure or Microsoft 365 service referencing the dependency onsdx.microsoft.com.
There is no supported mechanism to directly edit or override the CNAME for
sdx.microsoft.comitself from a customer-managed Azure DNS zone.
References:
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