Cognizant Technology Solutions — Former employee cannot login to onecognizant external site

AADSTS90072: User account 'vamsikrishna.[protected]@outlook.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
Troubleshooting details
If you contact your administrator, send this info to them.
Copy info to clipboard
Request Id: ec[protected]b-4d[protected]a38fd060100
Correlation Id: 4b979257-bb6c-4c46-bc74-a8ee53179fa9
Timestamp:[protected]T23:18:59Z
Message: AADSTS90072: User account 'vamsikrishna.[protected]@outlook.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
Flag sign-in errors for review: Enable flagging
If you plan on getting help for this problem, enable flagging and try to reproduce the error within 20 minutes. Flagged events make diagnostics available and are raised to admin attention.