To turn off recurring gifts site-wide, you may uncheck "Support recurring transactions" for each merchant account. To do so, please navigate to the following: 
  1. Select Setup > Payment Capabilities 
  2. Click Edit beside the Merchant Account name
  3. Click on Step 2. Merchant Details
  4. Unmark the box for "Support recurring transactions"
  5. Repeat steps 2-4 for each additional Merchant Account (if applicable)
  6. Click Save to save your changes

Note: This will not retroactively cancel sustaining gifts that have already been set up in Luminate Online. It will only affect recurring/sustaining gifts. For more information about cancelling sustaining gifts already in existence, please contact Support and reference this article.