These are default accounts that are created when you create a database, such as the accounts.
For greater security, change the passwords for these accounts.
Shaun Ritchie Citrix Store Front High Availability and Aggregation – A dual site Active Active design has a sample multi-site configuration using XML Notepad and explains how to use the Primary and Secondary keywords to override farm priority order.
Citrix Blogs Store Front Multi-Site Settings: Some Examples has example XML configurations for various multi-datacenter Load Balancing and failover scenarios.
Authentication also enables accountability by making it possible to link access and actions to specific identities.
Optimal Gateway requires datacenter-specific DNS names for Net Scaler Gateway.
Docs.Set up highly available multi-site store configurations explains configuring XML files on Store Front to aggregate identical icons from multiple farms/sites.
When Citrix Receiver switches between Store Front servers in multiple datacenters, it’s possible for each datacenter to be treated as a separate Receiver site. From Juan Zevallos at Citrix Discussions: To have multiple Store Front deployments across a GSLB deployment, here are the Store Front requirements: If you are running Xen App / Xen Desktop in multiple datacenters, you must design roaming profiles and home directories correctly.
The Optimal Gateway feature lets you override the Net Scaler Gateway used for ICA connections.