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Hello team,


I’m struggling to understand why my setup doesn’t work.

I have two domains: xxx.co & yyy.xxx.co 

I have Amplitude implemented on the two websites and the init options contain: “domain: .xxx.co”.

When my users move from xxx.co to yyy.xxx.co, a new cookie, deviceId & userId is assigned to this user.

NB: The two websites send the data in two different projects (but in the same workspace).
Do you have an idea why this doesn’t work?

Thanks in advance.

Hi @Kodze  😀 Thanks for posting here. Somehow we missed this. Were you able to make progress? I’m looping in @ning.chang from our support team, who can help out.  Thank you!


@Kodze & @Jeremie Gluckman , I have the ticket in Zendesk and will answer there!


Thank you @Denis Holmes😀


@Kodze Can you confirm if you got my email? Thank you!
@Yuanyuan Zhang Can you take a peek at this ticket if it reopens in Zendesk? Thanks!


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