The last two posts are correct, but are not associated with the query in the first post.
It is being repeated, so forgive me, but....
WLM is a standalone desktop program. "Support" in Microsoft terms, in this instance means that it will no longer receive updates (It hardly ever has), and enquiries for help will not be dealt with.
The MS server, which links to WLM, has changed and will, as said, no longer fetch or send mail from WLM. If you are using the program, with your ISP server, it will continue to work normally.
Imo, it is still one of the best desktop email programs, and have circumvented the problem, by leaving a forwarding option on the internet outlook page, to send on to my ISP mail service. This means that I continue to get and send live outlook and other mail with the desktop WLM.
Regedit's suggestion, regarding upgrading WLM to the later version, should be enough.