Install v1.0 and beta Microsoft Graph PowerShell modules

Install-Module Microsoft.Graph -Force
Install-Module Microsoft.Graph.Beta -AllowClobber -Force

# Connect With Hybrid Identity Administrator Account
Connect-MgGraph -scopes “Organization.ReadWrite.All,Directory.ReadWrite.All”

# Verify the current status of the DirSync Type
Get-MgOrganization | Select OnPremisesSyncEnabled

# Store the Tenant ID in a variable named organizationId
$organizationId = (Get-MgOrganization).Id

# Store the False value for the DirSyncEnabled Attribute
$params = @{
onPremisesSyncEnabled = $false
}

# Perform the update
Update-MgOrganization -OrganizationId $organizationId -BodyParameter $params

# Check that the command worked
Get-MgOrganization | Select OnPremisesSyncEnabled