/mcpRequired and Optional CSV Fields for Contacts Table 21: Required and Optional CSV Fields for Contacts Descriptions Deleting Updating Creating Column Heading The unique text name for the contact. Any combination of ASCII or unicode alphanumeric characters, periods, commas, spaces, and the special characters `, ~, !, @, #, $, %, ^, &, -, _, ', up to a maximum of 64 characters. Required Required Required Alias The number that callers dial to reach the contact. The value must be unique among users and contacts in the partition. Any combination of ASCII alphanumeric characters up to a maximum of 40 characters. N/A Optional Required Extension The unique text name for the contact template to apply to the contact during creation. N/A N/A Optional ContactTemplateAlias System Administration Guide 323 Bulk Administration Tool Required and Optional CSV Fields for Contacts