On the member page of a workspace you can manage the membership in this workspace. You can
•Remove existing members,
•invite provisional members again and
•invite new members.
All these actions are available by default not only to managers, but also to normal members of a workspace.
You remove members from a workspace on the Members page as follows.
•Select the checkboxes of those members you want to remove and choose in 
 the 
multi-selection toolbar or
 the 
multi-selection toolbar or 
•select in the 
 context menu if you want to 
remove a single member from this workspace.
 context menu if you want to 
remove a single member from this workspace. 
Removed members are also removed from all other workspaces they had access to only because they belonged to that workspace. All other workspaces, your address book and the address books of all other registered members are not affected by this action.
You invite a provisional member - recognizable by the entry as an email address - again with another invitation by
•click  in the context menu of the member entry.
  in the context menu of the member entry. 
On the member page of a workspace, you can also invite additional members to that workspace.
•Select  the menu at the top right of the Member List to 
display the 'Add Member' form. It allows you to specify additional 
members who should be granted access to this workspace.
  the menu at the top right of the Member List to 
display the 'Add Member' form. It allows you to specify additional 
members who should be granted access to this workspace. 
•Continue as described in 5.1.1Create shared workspaces If you invite additional members as a normal member, only Member and Restricted member are offered as roles. Only as Manager you can invite new members in the Manager role.