Active Directory Telephone Book, or ADTB in short is a small and smart windows forms program that allows you to quickly find persons within your organization. Do phonetic searches, or find people based on their location, department or telephone number. Help the people in your organization find each other! When started the first time ADTB scans your active directory for telephone numbers, names, email addresses etc. Depending on the size of your organization’s active directory this can take up a few minutes. These results are packed and encrypted into the user’s ‘application data’. This means, the second time the user launches ADTB it starts up very quickly. Used in free mode ADTB has two limitations: some times a dialogbox will appear and you cannot customize the title bar.