Replaces an existing group member's principal specification with
 a new group member's principal specification in all access control
 groups named in the directory or subtree that you specify.

 SYNOPSIS

      CHANGE SUBTREE tree-name[...] GROUP MEMBER old-member

                     new-member [EXCLUDE DIRECTORY directory-name]

 Arguments

 tree-name

 The name of the topmost directory in the subtree. When used without
 the optional recursion notation, the change applies only to groups
 in the specified directory. The recursion notation causes the change
 to additionally apply to groups in all child directories.

 old-member

 The name of the existing group member that you want to replace.

 new-member

 The new name of the group member.

 directory-name

 One or more directories that contain groups you want to exclude
 from this change. Multiple directories can be excluded in a single
 command. Separate multiple arguments with commas.

 Description

 This command replaces an existing group member's principal
 specification with a new group member's principal specification
 in all access control groups named in the directory or subtree
 that you specify. Use the recursion notation (...) to extend the
 command's effect to the groups contained in all child directories of
 that directory. If you use the command recursively, you can use the
 optional exclude directory directory-name argument to exclude groups
 named in a particular directory (and all its child directories) from
 group member modification. You can exclude multiple directories in a
 single command. Separate multiple exclude directory directory-name
 arguments with commas.

 Access Rights
 You must have control access to the group whose member you intend
 to change. If you use the command recursively, you must have control
 access to all groups affected by the command.