The pool managing the instance is not available or the location monitoring object cannot be found - discovery progress

Navigate to C:\Program Files\Microsoft System Center 2016\Operations Manager\Server

Open (as administrator) ConfigService.config

Edit the following lines, removing the \INSTANCENAME values so that only the SQL server value is shown.

     <Category Name="Cmdb">

        <Setting Name="ServerName" Value="jimmy\jimmy" />

        <Setting Name="DatabaseName" Value="OperationsManager" />

      <Category Name="ConfigStore">

        <Setting Name="ServerName" Value="jimmy\jimmy"  />

        <Setting Name="DatabaseName" Value="OperationsManager" />

To

     <Category Name="Cmdb">

        <Setting Name="ServerName" Value="jimmy" />

        <Setting Name="DatabaseName" Value="OperationsManager" />

      <Category Name="ConfigStore">

        <Setting Name="ServerName" Value="jimmy" />

        <Setting Name="DatabaseName" Value="OperationsManager" />

                   

Restart System Center Management Configuration and System Center Data Access Service.