OCS2007R2重新部署后，三方进行即时消息聊天时故障，报504错误。968802的补丁已经都打上了，还是出现504错误。
服务器上日志：
A Create Conference request sent to an Mcu was rejected. It will be retried but if this error continues to occur conferencing functionality will be affected.
Mcu: https://ocs07.apex.com:444/liveserver/asmcu/ Conference: sip:huangst@apex-intl.com.cn;gruu;opaque=app:conf:focus:id:5D2DC11E96687040B1DE2436641B63B2 Error: otherFailure
Cause: Overloaded or incorrectly functioning MCU.
Resolution:
Ensure that the Mcu is functioning correctly.
