If you were (for any reason) trying to remove and redeploy the Exchange Server 2007 on one node in an Active/Passive cluster, and when finished tried to failover the group to the next node and you got something like this in the Application Log: Source: MSExchangeIS, Type: Error, EventID: 5000 Description: Unable to initialze the … تابع قراءة MSExchangeIS Error 5000 in Exchange 2007 Cluster