Update SharePoint 2010 Farm Credentials Using PowerShell

#Input the Managed Account
#If there is only one managed account, the following line could be written as:
#$inputManagedAcct = Get-SPManagedAccount

$inputManagedAcct = Read-Host "Enter managed account as Domain\User" 
#Input the desired new password 
$inputPasswd = Read-Host "Enter new password for managed account" –AsSecureString 
#Change the password for the managed account to the new value 
Set-SPManagedAccount -Identity $inputManagedAcct -NewPassword $inputPasswd



------------------------------------------------------------------------------------------------------------------------------------------------------------       Update after AD Reset    ----------------------------------------------------------------

#Input the Managed Account
#If there is only one managed account, the following line could be written as:
#$inputManagedAcct = Get-SPManagedAccount

$inputManagedAcct = Read-Host "Enter managed account as Domain\User:" 
#Input the Managed Account 
$inputPasswd = Read-Host "Enter password from Active Directory for managed account:" –AsSecureString 
#Change the password in SharePoint for the managed account to the new value 
Set-SPManagedAccount -Identity $inputManagedAcct -ExistingPassword $inputPasswd –UseExistingPassword $true