Systems, methods, computer program products, and the like, are provided herein for collaboration conferencing with multiple participants over a communications network, and more specifically for utilizing a received Automatic Number Identification (ANI) value to validate an identification of a user of the collaboration system. In general, the ANI is a value associated with a telephone call or other communication of a telecommunications network that identifies the originating telephone number. For example, a telephone call placed from a communication device (such as a telephone at a person's home) may include the telephone number associated with the communication device, such as the ten-digit telephone number of the device. The ANI value may be obtained by one or more networking devices to determine the originating device or number of the communication.