| ComTech UC Chat Room Limits for IM & Presence Environment | ||
| Number of... | Maximum | Entity |
| Persistent chat rooms per node - 2 nodes | 3,000 | Rooms |
| Total rooms per node (ad hoc and persistent) - 2 nodes | 33,000 | Rooms |
| Occupants per room | 1,000 | Occupants |
| Messages retrieved from the archive. This is the max number of messages that are returned when a user queries the room history. | 100 | Messages |
| The number of messages in the chat history displayed by default. This is the number of messages that are displayed when a user joins a chat room. | 5 | Messages |