Microsoft SQL server hosting the configuration database is currently not available."SQL server is not available" It may be too busy, maxed out.

Overview

This article discusses the issue where the following error appears and all components except two PowerShell monitors are not showing up after setting up the Veeam Backup and Replication Server template in SAM:

Microsoft SQL server hosting the configuration database is currently not available.
"SQL server is not available" It may be too busy, maxed out.

Environment

All SAM versions

Cause 

This occurs because of permissions issues.

Resolution

Edit the template for each Powershell Monitor and Run the script under specified account.
If the error persists, change the agent service on target node to run as the administrator account.