Docs / man for smbpasswd(5) has section on "Account Flags". However there is no
mention or definition of the "X" flag that I see in the smbpasswd file on my
servers. I appears this flag may have been added sometime during 2.x and the
docs were never updated. It's not on my 3.0.13 system, nor in the online man pages.
Fixed. Thanks for reporting this.
- John T.