The Adobe Visitor Id is not unique if its a combination of post_visid_high and post_visid_low then it should be unique. Can you give me an example explaining the generation of visitor id using combination of post_visid_high and post_visid_low, I see in the data the visitor id is alpha numeric ,Is there a conversion?
Also , If a person gets assigned a Adobe Visitor Id and comes back (after few days) to visit the same page/website will he/she be assigned the same Adobe visitor Id (assuming they didn't delete the cookies). I am having issues where we cannot identify customers ,because the post_evar value is not always captured in DatawareHouse. What could be the possible reason's for an post evar value to be not captured which makes the customer unidentifiable ?
Based on more research, I got the answer to my own question. I used Adobe analytics debugger and visited the site blocking cookies and that was the answer to my question. When a customer blocks cookies or deletes cookies and visits the site, all of these users /customers get assigned the same Adobe Visitor Id.