Navigate to your groups list by selecting "Groups" from the panel on the left
After opening the desired group, select "Invite people" from the tabs above.
Invite non-colwiz users by typing their email address. Invite your contacts by writing their names.
"Send Invitation" when your invitation list is complete.
Note: Different group types have different limitations of how people can invite and be invited.
Open Group: Anyone an join or Invite others. Group is visible in searches.
Closed Group: Only Admins and Moderators can invite or approve members for invitation. Group is visible in searches.
Secret Group: Only Admins and Moderators can invite members. Group is NOT visible in searches.