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  • idList: list identifier
  • listGuid: GUID of the list
  • newGroupName: name of the group to be created



The returned value is the ID of the created group.

If a group with the same name already exists in the list, then no new group is created and an error code is returned, otherwise the ID of the created existing group is returned.

Maximum allowed lenght for Group names is 50 characters, if you specify more than 50 characters the actual Group name will be truncated by MailUp

Sample CreateGroup response