Hello Massimo,
You can have a look at Adaxes Event Log.
Also, we advise you to have a look at all scripts executed by Business Rules, Custom Commands and Scheduled Tasks. You need to check for any scripts that need to release resources, connections in the first turn, explicitly. If such scripts run with an error and don't release the resources when necessary, the connections may remain hanging for a long period of time. Since the number of open connections allowed to Adaxes Service is limited, earlier or later such scripts can exhaust the connection pool and block the service operation.
In case if your script needs to release resources / close connections explicitly, we suggest using the try ... finally block in order to make sure that connections are closed and resources are released even if a script errors out. For an example on how to use the block, have a look at the following script in our Script Repository: http://www.adaxes.com/script-repository ... r-s364.htm.