On a Windows 8 client.

I can browse to my sharepoint site in 365 without issues: <https://myPublicserver.sharepoint.com>

But when I try to map a drive to that address I get this error:
"The folder you entered does not appear to be valid"

I made sure to add <https://myPublicserver.sharepoint.com> to my trusted list of sites.

What could the problem be?

Edit: OK I tried to do it with net and this is the error I get:

```
C:\Users\me>net use b: https://mypublicserver.sharepoint.com/my%20lib
System error 224 has occurred.

Access Denied. Before opening files in this location, you must first add the web
 site to your trusted sites list, browse to the web site, and select the option
to login automatically.

```

I can confirm though that the site has been added to the trusted sites list.