Disable Account API

Can you try the API as below, replace :id with actual account id

POST 'https://sailpoint.api.identitynow.com/v3/accounts/:id/disable'
Content-Type: application/json
Authorization: Bearer <TOKEN>

Body - raw json -
{
  "externalVerificationId": "",
  "forceProvisioning": false
}

If that still doesn’t work, try the old CC api ( can be deprecated anytime)

POST {{api-url}}/cc/api/account/provision/:id
Body - form data
disabled:true