A custom property sheet is an extension of a standard property sheet to which you may add additional pages. Each additional page may contain one or more standard or custom fields appropriate to that OfficeTalk data type.
You may assign different property sheets to different OfficeTalk users. For example, you may wish to provide your sales team with one view onto the data held in your contact database and you may want your accounts team to have an entirely different view of that data. You can do this by creating separate custom property sheets. One of the property sheets could contain sales related data, such as 'Next Contact Date' and 'Interests'. The other property sheet could contain accounts related data such as 'Monthly payment date' and 'Customer Ref. No.'.
OfficeTalk lets you assign the sales related property sheet to the users in the sales team and the accounts related property sheet to the users in the accounts team. Whenever any user from either team accesses the Contact property sheet, the additional relevant pages would be shown.