This is not true. From Microsoft's perspective, IPv6 is a mandatory part of the Windows operating system and it is enabled and included in standard Windows service and application testing during the operating system development process.
Microsoft 365 supports both IPv6 and IPv4; however, not all Microsoft 365 features are fully enabled with IPv6. This means that you must use both IPv4 and IPv6 to connect to Microsoft 365.
Microsoft Teams and IPV6 Microsoft Teams Direct Routing only supports IPv4. The Microsoft Teams service and client support both IPv4 and IPv6. If you want to control communications to Microsoft Teams, use the IP address ranges in Office 365 URLs and IP address ranges.
Millions of users with IPv6-ready computers are using IPv6 to interact with these services and with one another. The apps, the operating systems, the routing infrastructure, the ISPs, and the services are not merely ready, they're activated.”
If the program that you use to connect to SharePoint Online supports IPv6, it will use IPv6 by default on both wired and wireless networks. If you want to control communications to SharePoint Online, ...
Office 365 IPv6 support for government offerings conforms to the Office of Management and Budget (OMB) Memorandum for Chief Information Officers of Executive Departments and Agencies, as well as the Federal Government Adoption of Internet Protocol Version 6 (IPv6) memorandum. Microsoft Office 365 for Government is a multi-tenant service that stores US government data in a segregated community cloud. Like other Office 365 offerings, it provides productivity and collaboration services, including Exchange Online, Skype for Business, SharePoint Online, and Microsoft 365 Apps for enterprise.
Exchange Online and IPv6. If the program that you use to connect to Exchange Online supports IPv6, it will use IPv6 by default on both wired and wireless networks. If you want to control communications to Exchange Online, use the IP address ranges in Office 365 URLs and IP address ranges.
Office 365 supports both IPv6 and IPv4; however, not all Office 365 features are fully enabled with IPv6. This means that you must use both IPv4 and IPv6 to connect to Office 365. If you are filtering your outbound traffic to Office 365, the full list of IPv6 addresses that are supported by Office 365 can be found in the article Office 365 URLs ...
Microsoft Teams Direct Routing only supports IPv4. The Microsoft Teams service and client support both IPv4 and IPv6. If you want to control communications to Microsoft Teams, use the IP address ranges in Office 365 URLs and IP address ranges.
IPv6 does not support some Rights Management Services (RMS) scenarios. IPv6 does not support BlackBerry® Enterprise Server (BES) because BlackBerry doesn't support IPv6. If you use Active Directory Federation Services (AD FS) with Office 365, advertising your AD FS network endpoint to Office 365 using IPv6 is not supported.
From Microsoft's perspective, IPv6 is a mandatory part of the Windows operating system and it is enabled and included in standard Windows service and application testing during the operating system development process.
The World IPv6 Launch in June 2012 marked a key turning point in this transition. When you read this book, some of the most important web services in the world, not only from Microsoft but from across the technology community, are operational on the IPv6 Internet.
If IPv6 is disabled on Windows 7, Windows Vista, Windows Server 2008 R2, or Windows Server 2008, or later versions, some components will not function. Moreover, applications that you might not think are using IPv6—such as Remote Assistance, HomeGroup, DirectAccess, and Windows Mail—could be.
If you’ve never had to troubleshoot a server not being able to connect to another server, it must be your first day on the job. Connectivity troubleshooting is a critical tool in your troubleshooting bag. If it’s not, add it immediately; you’re welcome.