Duplicate emails can occur for two reasons. First, check whether two separate instances of TaskCentre are running. If so, disable the server service on the duplicate instance:
Disable the server service on the instance that is a duplicate by logging on to the server hosting the software.
Run the services snap-in.
Right-click the **TaskCentre Server Service**.
Select Properties.
Change the Startup Type to Disabled.
If there are two MSSQL trigger agents configured, unregister one:
Log in to TaskCentre.
Expand the System node.
Click **Agents**.
Right-click the agent to unregister.
Select Unregister.