DocumentationIdentity Service Guide

Analytics and Experience Cloud ID Requests

Last update: Thu Jun 10 2021 00:00:00 GMT+0000 (Coordinated Universal Time)

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An overview of how the Experience Cloud Identity Service works with the legacy Analytics ID.

Summary

Historically, the Experience Cloud Identity Service has been integrated tightly into Adobe Analytics. It remains an integral part of Analytics but now performs important functions for other solutions and features in the Experience Cloud. Because of this historical legacy, checking for or writing an Analytics ID works a little differently than with the generic process described in How the Experience Cloud Identity Service Requests and Sets IDs…. For additional information on the order of operations for checking IDs, see Setting Analytics and Experience Cloud IDs.

If the Experience Cloud (AMCV) cookie is not present, then an ID service call to Adobe generates a response that varies depending on the presence or absence of a legacy Analytics ID. The legacy Analytics ID is stored in the s_vi cookie. The table below describes how IDs are written to the AMCV cookie based on the state of the s_vi cookie.

s_vi Cookie Status
Description
s_vi Cookie is Not Set
The ID service assigns visitors a Experience Cloud ID (MID). The MID identifies your visitors to Analytics and other Experience Cloud solutions.
s_vi Cookie is Set

When a site visitor with an s_vi cookie first encounters the Experience Cloud Identity Service, this service:

  • Writes the Analytics ID stored in the s_vi cookie to the AMCV cookie. This is written as the Analytics ID (AID). This action does not affect your visitor counts. Analytics will continue to identify users with their legacy IDs.
  • Writes the MID to the AMCV cookie. The MID identifies users across different solutions.

Note: With a grace period, the data center response always includes a legacy ID that is stored in the s_vi cookie. During the grace period, the legacy ID is written to the AMCV cookie as the AID value.

NOTE
Users identified by the s_fid cookie will not have their legacy FID value migrated to the AMCV cookie. With an s_fid cookie, users will be migrated as if no s_vi cookie was present (see above) and appear as new visitors to your site. See Analytics Cookies for more information.

If the AMCV cookie is present, Analytics will use the MID as the Analytics identifier if there is no legacy Analytics ID value in the cookie.

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