How does MCID migrate legacy Analytics IDs? | Community
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jantzen_b
Adobe Employee
jantzen_bAdobe Employee
Adobe Employee
August 4, 2017
Solved

How does MCID migrate legacy Analytics IDs?

  • August 4, 2017
  • 2 replies
  • 3362 views

My company is looking to migrate to the Marketing Cloud ID Service. I am wondering how the MCID service migrates our existing Analytics IDs to the MCID service?

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Best answer by jantzen_b

The Marketing Cloud ID service maintains your existing Analytics IDs by migrating them into the new AMCV cookie as an additional key value pair. The legacy AID is used as the primary key in reporting for that visitor with the mid being a secondary key.

You can learn more in the following knowledge base article and video: MCID Analytics visitor migration

2 replies

jantzen_b
Adobe Employee
jantzen_bAdobe EmployeeAuthorAccepted solution
Adobe Employee
August 4, 2017

The Marketing Cloud ID service maintains your existing Analytics IDs by migrating them into the new AMCV cookie as an additional key value pair. The legacy AID is used as the primary key in reporting for that visitor with the mid being a secondary key.

You can learn more in the following knowledge base article and video: MCID Analytics visitor migration

C
chrisz40533089
October 16, 2018

Jantzen - Thank you for the resources. I have two questions regarding the video:

(1) Why the ID service code has to check the demdex.net cookie for the UUID and then use it along with the OrgID to generate the MID, INSTEAD OF simply getting the MID directly from the first-party domain?

(2) In the scenario of SiteB, the final codes set on SiteB.com domain should not include the AID because the visitor didn't visit SiteB before (and thus had no legacy s_vi cookie), right?

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