OOXML approved as an ISO standard

OOXML approved as an ISO standard

Here is one example, or maybe you thinking more along the lines of Kerberos?

And that does not even get into patent issues.

Quoting: "17. Not content with Microsoft's corruption of the Kerberos standard, Microsoft has filed for a patent on its proprietary version. Consequently, not only will Microsoft products fail to interoperate with non-Microsoft products (because of the modification), but Microsoft will not allow anyone else to use its version unless they purchase a license from Microsoft."

I think you can try to license Microsoft's Kerberos patents from this page.

I don't think there is any silver lining in this cloud.