Thanks.

I've tried:

exec master..xp_cmdshell 'bcp " execute master.dbo.sp_help_revlogin" queryout "\\location names\example.txt" -c -T -SServername -'

I get in the output; "host-files must contain at least one column, Unable to resolve column level...

SQLSACT (6/12/2013)

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Since you can't mirror system databases which is where this info is stored - The best thing to do is to script out the logins and permissions. Do this...