Business Unit Custom Fields Tab
Required security profile permissions: External Business Unit View, Business Unit Custom Fields View
The Custom Fields tab enables you to rename the custom fields in user profiles in the business unitFile format associated with Microsoft Excel; may also be expressed as .xlsx. This helps clarify the purpose of each custom field you use in your environment.
Custom Properties
Custom 1, Custom 2, Custom 3, Custom 4, and Custom 5 appear in the General tab of a user profile. They are fields you can create yourself to specify custom data to users that is not available by default.