Use CRS when no unique id is present in Client CRM

[#1]

Hi Team,

On our client's website, visitors don't login much . Orders/Bookings are done using phone number or Email Id. We could not use these in CRS as this a PII data . Can anyone advise how do we use the CRM data in such scenarios for the targeting purpose.

Thank you.

[#2]

Just a thought ... What do they use as the customer id going into Target? Best case scenario would be to surface some sort of customer id in the client side (from server) once phone number or email is known and store that as a cookie or local storage (if only using one subdomain). Then you could use that cookie value as the mbox3rdpartyid. If not, then you would have to collect the out of the box TNT id that gets generated on the Target end and comes back in the mbox cookie. With either approach, you could update the Target profile server side with the values that are non PII. 

https://developers.adobetarget.com/api/#updating-profiles