Thursday, May 30, 2013

Microsoft Office 365 and IPv6 Support

It is pretty cool to see Microsoft turning up more services on IPv6. If you are a user of Office 365 like my company is then you too can use IPv6 to access O365 resources.

Microsoft has an Office 365 IPv6 Wiki Page that outlines the IPv6 addresses they are using for the service. They are using a lot of /64 subnets but what I find odd is that they have not summarized them to specific prefixes to make filtering (for those that do it) easier. It would also be nice if they published it as an xml or Excel file to allow folks to use wget or PowerShell to remotely get the file for updates and be able to parse it and run a script against it to allow everyone to keep their filters current. I guess the other option is the use dig and a recursive DNS AAAA lookup to get all the same information potentially.

Microsoft also has a portal for getting the URL and IP address information they are using for Office 365 in general and that is here. It is useful because it breaks down by address each of the services so if you are really detailed (perhaps a bit too much?) you can limit based off that too.

There have been some reported outages on the IPv6 side for Office 365 and Mark Minasi and I have traded some jokes back and forth about his experience using his Verizon mifi that provides IPv6 but which often breaks his Office 365 access or at least it appears too - I think we need to troubleshoot it a bit more.

If you are wondering what products from Microsoft are at in terms of IPv6 support then look no further - you can find that information here.
- Ed


eric said...

I wonder when its going to be stable!? We have IPv6 in our office and twice now in the past month we've had outages because the Office 365 IPv6 service is down or flakey and Outlook apparently doesn't fail back to IPv4 yet.

Ed Horley said...

I have noticed some of the same issues however it should failover with some help. I have noticed that Outlook sometimes needs you to cancel the server request and then hit F9 to start again. Do realize the only part that Office 365 uses is User ID auth and SharePoint so the impact should be limited to those. I am considering setting up a monitoring service to watch the IPv6 availability for Office 365.
- Ed

mike said...

Since day 1 after Microsoft "upgraded" to Office 365 I've had no end to problems with Outlook. Seems to be the same on all 4 of my machines Outlook will take from 10 minutes to 4 hours to connect to the server if left to it's own. If I go into network and sharing and disable IPV6 on the network adaptor Outlook will be connected to the server within 5 to 10 seconds. Then IPV6 gets turned back on until the next time I need to close/open Outlook... or until I notice that "this folder was last updated..." status message