The following cookies are used for various purposes in DXP.
| Cookie Name | Purpose |
| ARRAffinity | Strictly necessary. Routes the request made through a web browser to the same machine in the DXC cloud environment. See ARRAffinity - Microsoft Azure. This cookie is deleted when you close your browser. |
| \_\_cfuid | Strictly necessary. Speeds up page loading times and overrides any security restrictions that may be applied to a browser based on the IP address from which it comes. Persistent (1 year from creation). See CloudFlare cookies. |
| ai_session | Used with Microsoft Application Insights for collecting statistical usage and telemetry information. Unique anonymous session identifier cookie. |
| ai_user | Used with Microsoft Application Insights for collecting statistical usage and telemetry information. Unique user identifier cookie for counting the number of users accessing an application over time. |
| TiPMix | Used in Azure during deployments to pin a user session to a deployment slot. |
| x-ms-routing-name | Used in Azure during deployments to route to deployment slots. |
See [Optimizely platform cookies](🔗) for information about other cookies used in the Optimizely platform.