title: Maintenance Window Azure CosmosDB
body: <p>Does anyone know what window CosmosDB uses for system updates?  Is there any impact to users during this updates.  I've been combing through the documents to find the answer to this but they're pretty vague at least with what I've found.  Also we know there is a default window on Sunday at like 4am EST and we know it can be customized for other services.</p>
  <p>Thanks.</p>