When a schema change occurs, DLM Dashboard waits 30 seconds before sending an email notification. If another change happens in that 30-second window, it's added to the same email as the first change, so you only get one email, not two.

If you want to get fewer emails from DLM Dashboard - for example, if you only want to get one email a day - you can increase this time window.

To increase the time window:

1. Go to C:\Program Files (x86)\Red Gate\DLM Dashboard 1\SQLServerMonitoringService
   
2. If there's a file called UserSettings.config in the folder:
   1. Open the file in a text editor, running as administrator (right-click and select Run as administrator):
       

   2. Inside the <appSettings> node, copy and paste the following:

      <add key="DbStatusTransition.BufferTimeSpan" value="00:30:00" />
      

   3. Inside the <appSettings> node, edit the value of the key DbStatusTransition.BufferTimeSpan to the time span you want. 
      The value must be in the format hh:mm:ss.
      For example, if you want the window to be one hour, set the value to 01:00:00.
3. If the file doesn't exist: 
   1. Open a text editor, running as administrator (right-click and select Run as administrator):
       
   2. Create a new file. 
   3. Save the file as UserSettings.config in the folder C:\Program Files (x86)\Red Gate\DLM Dashboard 1\SQLServerMonitoringService
      

   4. In the file, copy and paste the following:

      <?xml version="1.0" encoding="utf-8"?>
      <appSettings>
          <add key="DbStatusTransition.BufferTimeSpan" value="00:30:00" />
      </appSettings>

   5. Inside the <add key="DbStatusTransition.BufferTimeSpan" value="00:30:00" /> node, edit the value string to the time span you want. 

      The value must be in the format hh:mm:ss.

      For example, if you want the window to be one hour, set the value to 01:00:00.

4. Open Windows Services (services.msc) and restart the DLM Dashboard Monitoring Service.

You've now changed the time window.