The SBS monitoring database can be a pain.  If left unmanaged and unloved it will eventually consume too many resources on the server, causing performance issues.  To clearup the database, you can follow the details here:

https://docs.microsoft.com/en-us/archive/blogs/sbs/how-to-recreate-the-sbsmonitoring-database

The PS1 script is hosted on onedrive, so let me know if it disappears and I’ll see if we can recover it.

Extract the PS1 file to c:\windows\temp\, check to ensure the script isn’t blocked and that script execution is enabled.

SBS2008 – Open an admin powershell prompt, and run the script

SBS2011 – run “c:\program files\windows small business server\bin\movedatapowershellhost.exe” as administrator, and then run the script.