Access SharePoint 2013 Central Administration (Windows Start menu > All Programs > Microsoft SharePoint 2013 Products).

In the SharePoint Central Administration: 

1. In the Central Administration menu on the left, select Security.

2. In the Security page, under Users, click Manage the farm administrators group.

3. In the People and Groups - Farm Administrators page, click New.

4. In the Share 'Central Administration' dialog box, in the Add people to the Farm Administrators group box, add the crawling account, and then click Share.

   

Access SharePoint 2010 Central Administration (Windows Start menu > All Programs > Microsoft SharePoint 2010 Products).

In SharePoint 2010 Central Administration, under Security, select Manage the farm administrators group.

In the People and Groups page, click New.

In the Grant Permissions dialog box, in the Users/Groups box, add the crawling account, and then click OK.

Access SharePoint 3.0 Central Administration (Windows Start menu > All Programs > Microsoft Office Server).

Click Operations.

Click Update farm administrator's group.

Click New.

In the Add Users page:

1. In the Users/Groups text box, add the crawling account.

2. Under Give Permissions:

   1. Select the Add users to a SharePoint group radio button.

   2. In the drop-down list, select Farm Administrators [Full Control].

   3. Click OK.