I don’t do this a lot since most of the apps are now a days using Azure SQL using all the benefits it offers. So I thought it would be better to take note of all the steps done for this. If the msdb database is damaged and you do not have a backup of the msdb database (for whatsoever reasons), you can create a new msdb by using the instmsdb script. In this blog post, we’ll go through steps required for the same.
Rebuilding the msdb database using the instmsdb script will eliminate all the information stored in msdb such as jobs, alert, operators, maintenance plans, backup history, Policy-Based Management settings, Database Mail, Performance Data Warehouse, etc.