Error while adding client certificate to anaplan



I am trying to add client certificate to Anaplan using Anaplan Administration->Security->Certificates.

Received following error (screen shot attached)

"No active user found with email address <[email protected]> and tenant id <1214....>"


Note: I downloaded SMIME certificate (issued by GlobalSign PersonalSign Partners CA - SHA256 - G2) in .pfx format. Created client certificate.pem and private key.pem using OpenSSL tool. Edited client certificate to only have content starting with-----BEGIN CERTIFICATE-----.  User who has tenant admin access tried to add the client certificate to Anaplan.

Please advise