Adobe Target Cookies

Adobe Target uses cookies to give website operators the ability to test which online content and offers are more relevant to visitors.

You can change these settings if needed, except for the cookie duration. Consult your account representative when changing cookie settings.


Adobe Target users can also create customized third-party cookies.

Setting Information
Cookie name mbox.
Cookie domain The second and top levels of the domains from which you serve the mbox. Because it is served from your company’s domain, the cookie is a first party cookie. Example:
Server domain, using the client code for your Adobe Target account.
Cookie duration The cookie remains on the visitor’s browser two years from their last login. You cannot change the cookie duration.

If any of your domain names include a country code, such as, work with your Client Services to configure your at.js to support this code.

The cookie keeps some values to manage how your visitors experience Adobe Target campaigns:

Value Definition
session ID A unique identifier for a given user session. By default the session expires after 30 minutes of inactivity. If you are generating sessionId yourself (for example, for server-side implementations), ensure following:
  • The Session ID can be any printable string except a space, question mark ( ? ), or a forward slash ( / ).
  • The Session ID should be from 1 through 128 characters in length.
  • For a particular session, its value must stay the same across multiple requests
  • You should never have parallel sessions (distinct sessionIds) for a given visitor at any point in time.
Routing to a particular node in the edge cluster is done using Session ID.
  • The session is active for 30 minutes on the server side. Therefore, you shouldn’t use a different Session Id for a particular tntId/thirdPartyId within 30 minutes of the last request made with the tntId/thirdPartyId. Otherwise, changes to the profile could be inconsistent and unpredictable.
  • A new Session ID must be used after thirty minutes of inactivity from a visitor.
  • Using the same Session ID with multiple tntIds/thirdPartyIds can cause unpredictable changes to the profiles identified by the tntId/thirdPartyIDs.
Note: See limit on number of concurrent requests for a given session ID.
pc ID A semi-permanent ID for a visitor’s browser. Lasts until cookies are manually deleted.
check A simple test value used to determine if a visitor supports cookies. Set each time a visitor requests a page.
disable Set if visitor’s load time exceeds the timeout configured in the at.js file. By default, this timeout lasts 1 hour.

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