| Event Id | 8199 |
| Source | MSExchangeDCS |
| Description | An error occurred while the conference technology controller was communicating with the T.120 MCU ComputerName. Error code: 80040154; Message: Class not registered |
| Event Information | A series of events(10006,10002....) may be logged every few minutes in the Event Viewer Application log of an Exchange 2000 Conferencing Server in your conference site. CAUSE: This behavior may occur if the servers in your conferencing site do not all have the same version of the Exchange 2000 Conferencing Server service pack installed. RESOLUTION: To resolve this behavior, make sure that all Exchange 2000 Conferencing Server computers in your conferencing site are running the same version of the Exchange 2000 Conferencing Server service pack. To do so, install the latest Exchange 2000 Conferencing Server service pack on all servers that are in your site. |
| Reference Links | Event IDs 10006, 10002, 2002, and 8199 Are Logged Every Few Minutes in Exchange 2000 Conferencing Server |
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