I recently installed MOM on a company server with SQL Server already installed on it. I installed all components on one server because we only have a few servers to monitor inside our local firewall.

After installation of my central computer, I made sure to reboot the machine. I looked at the MOM Monitor and saw a 'Service Unavailable' error.

Source: OnePoint Operations
Name: Failed to prepare event for insertion

Description:
The Consolidator was unable to retrieve data from the EventSource table while attempting to prepare an event's data for insertion into the database. Will retry every 30 seconds.

Details: IDispatch error #3222

All of my pre installation steps were accomplished correctly but I am not sure why this is happening.

Contributed By: Mike Betts, MVP MOM
You can ignore this as long as when you go and look in the 'All Windows NT Events' view you can see your Windows NT events relatively up to date. I have not got an official answer on this but my thought is that this occurs because MOM attempts to write to the database before it has initialized, resulting in said error.

Because there is no "autocorrection" facility yet in MOM, i.e. that if the "fix" for an error comes in then it gets auto resolved, then this means that this alert remains active event though the database does start receiving data normally.

In other words, ignore it.

Contributed By: Nissim Ben-Maor, MVP MOM
I'm 100% with Mike there, ignore it for now, but check on if the error repeats on the long run.