In a new domain separated instance, which data will a user in customer Domain X...

In ServiceNow, domain separation is used to segregate data, processes, and administrative tasks into logical groupings called domains. This allows for control over data visibility and operations within an instance. When it comes to data visibility:

•Domain X: A user in Domain X will definitely have visibility to their own domain, as this is the primary context in which they operate1.

•Child domains of Domain X: Users can view data in their home domain (Domain X) and any child domains of that home domain. This is because child domains inherit permissions and visibility from their parent domains, allowing users in a parent domain to see data in the child domains1.

However, users do not have access to data present in their parent domains or other unrelated domains by default. The primary domain and default domain are typically reserved for global or top-level administrative purposes and are not automatically visible to users in customer domains unless specific permissions are granted12.

It’s important to configure domain separation carefully to ensure that users have the appropriate level of access to data necessary for their roles while maintaining the security and integrity of the data across the instance31.