RESOLUTION:
Issue is resolved in 8.1.2 available for download here.
https://support.oneidentity.com/one-identity-cloud-access-manager/download-new-releases
WORKAROUND
To workaround this issue change the User’s unique ID attribute value in the LDAP FEA to use userPrincipalName instead.
STATUS
This issue is fixed in the latest release of Cloud Access Manager.