In order for reverse number lookup (or reverse toast) to function properly, please follow these instructions:
1) Create a NEW contact in Outlook for the contact you frequently receive calls from.
2) Enter at least the following information:
a) First Name
b) Last Name
c) Display Name
d) Email Address - !Important
e) Telephone Number - !Important
The Telephone Number must be in full, international format:
With no breaks, lines, dashes or (0).
3) Save the new contact.
NB - The first time the person calls you from this number, the reverse number lookup will not work. The second time, the correct user information will show.