To reset the content index of your Search Service Application, you can either use the UI as described in the following TechNet article, or use the following PowerShell command :
The Reset function takes 2 Boolean parameters :
- Disable Alerts
- Ignore Unreachable Server
This sample is for a Farm containing only one instance of the Search Service Application, if you have more than one you should adapt the sample.
Command is not recognized in PowerShell, any prerequisites so that this commande would be recognized?
You need to run 'Add-PSSnapin "Microsoft.SharePoint.PowerShell"' first