Cognizant Technology Solutions — I'm unable to login in one cognizant portal

I complete pre-joining formalities.But now I am unable to login into 1C portal.please resolve problem as soon as possible thank you
Request Id: a310156b-8459-49ed-98bd-6c0fde6b0300
Correlation Id: a22ee8dd-67c4-4ad8-add1-82178c43cd2a
Timestamp:[protected]T08:03:54Z
Message: AADSTS90072: User account '[protected]@gmail.com' from identity provider 'live.com' does not exist in tenant 'Cognizant' and cannot access the application 'https://onecognizantexternal.cognizant.com'(ENT_onecognizantexternal_SAML_PROD) in that tenant. The account needs to be added as an external user in the tenant first. Sign out and sign in again with a different Azure Active Directory user account