Event ID - 100

Event Id100
SourceMSExchangeRepl
DescriptionClustered mailbox server %1 was moved from %2 to %3 with a move comment of "%4". The move operation took %5 milliseconds for verification, %6 milliseconds to take the databases and Information Store resources offline, %7 milliseconds to take the System Attendant resource offline and to move the clustered mailbox server, %8 milliseconds for verifying that replication direction was reversed for the databases, and %9 milliseconds to bring the Information Store and databases resources online.
Event Information According to Microsoft :
cause :
This Information event indicates that clustered mailbox server %1 was moved from %2 to %3 with a move comment of "%4". The move operation took %5 milliseconds for verification, %6 milliseconds to take the databases and Information Store resources offline, %7 milliseconds to take the System Attendant resource offline and to move the clustered mailbox server, %8 milliseconds for verifying that replication direction was reversed for the databases, and %9 milliseconds to bring the Information Store and database resources online.
Resolution:
This event is a success notification and requires no user action.
Note: If you are not already doing so, consider running the tools that Microsoft Exchange offers to help administrators analyze and troubleshoot their Exchange environment. These tools can help you make sure that your configuration is in line with Microsoft best practices. They can also help you identify and resolve performance issues, improve mail flow, and better manage disaster recovery scenarios.
Reference LinksEvent ID 100 From Source MsExchange Repl

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