Hi, Cor,
I figured out the problem; I'll provide the details here so as to help
others.
-I do have an MSDN subscription.
-I did follow the process you describe to post to this group, and I made
sure that this group I posted to was explicitly listed as a "managed
newsgroup" on Microsoft's web page (I actually reposted here because the
original group I posted to - microsoft.public.dotnet.security - wasn't
explicitly listed on the MS page that had a list of managed groups, but this
group was.) However, from another MS web page I found that
microsoft.public.dotnet.security is actually considered a managed group too.
-It turns out that the userID suffix I had registered with MS was no longer
auto-recognized by MS, and I've fixed it and reposted.
Thanks for your feedback!
Anyhow,