A method of mitigating adverse effects of co-located communication endpoints (102-1, 102-2, 102-3, 102-n) during a communication session, comprising: reproducing, by a loudspeaker of a first communication endpoint of a plurality of communication endpoints, a uniquely identifying tone component; receiving, by a microphone of the first communication endpoint, a first sound signal comprising a first voice data component and the uniquely identifying tone component reproduced by the loudspeaker; removing, by echo cancellation, the uniquely identifying tone component from the first sound signal; sending the first sound signal to a communication server comprising a processor; receiving, by the processor, the first sound signal comprising the first voice data component from the first communication endpoint; receiving, by the processor, from a second communication endpoint of a plurality of communication endpoints, a second sound signal comprising a second voice data component and the uniquely identifying tone component of the first communication endpoint; continuously determining, by the processor, that two or more of the plurality of communication endpoints (102-1, 102-2, 102-3, 102-n), each associated with at least one corresponding participant, are co-located when a sound signal comprising the unique identifying tone of the first communication endpoint of the two or more endpoints (102-1, 102-2, 102-3, 102-n) is received from the second communication endpoint of the two or more endpoints (102-1, 102-2, 102-3, 102-n); and based on a determination of multiple communication endpoints (102-1, 102-2, 102-3, 102-n) being co-located, at least one of processing the received sound signal by selectively altering, by the processor, the received sound signal, or initiating an instruction to inhibit contribution, to the sound signal, from at least one of the co-located multiple communication endpoints (102-1, 102-2, 102-3, 102-n). reproducing, by a loudspeaker of a first communication endpoint of a plurality of communication endpoints, a uniquely identifying tone component; receiving, by a microphone of the first communication endpoint, a first sound signal comprising a first voice data component and the uniquely identifying tone component reproduced by the loudspeaker; removing, by echo cancellation, the uniquely identifying tone component from the first sound signal; sending the first sound signal to a communication server comprising a processor; receiving, by the processor, the first sound signal comprising the first voice data component from the first communication endpoint; receiving, by the processor, from a second communication endpoint of a plurality of communication endpoints, a second sound signal comprising a second voice data component and the uniquely identifying tone component of the first communication endpoint; continuously determining, by the processor, that two or more of the plurality of communication endpoints (102-1, 102-2, 102-3, 102-n), each associated with at least one corresponding participant, are co-located when a sound signal comprising the unique identifying tone of the first communication endpoint of the two or more endpoints (102-1, 102-2, 102-3, 102-n) is received from the second communication endpoint of the two or more endpoints (102-1, 102-2, 102-3, 102-n); and based on a determination of multiple communication endpoints (102-1, 102-2, 102-3, 102-n) being co-located, at least one of processing the received sound signal by selectively altering, by the processor, the received sound signal, or initiating an instruction to inhibit contribution, to the sound signal, from at least one of the co-located multiple communication endpoints (102-1, 102-2, 102-3, 102-n). processing the received sound signal by selectively altering, by the processor, the received sound signal, or initiating an instruction to inhibit contribution, to the sound signal, from at least one of the co-located multiple communication endpoints (102-1, 102-2, 102-3, 102-n).