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. -WC
Fixed. Thanks for reporting this. - John T.