You have configured an Identity Provider (IdP) for @<aaa company>.com domain on your ICDm tenant (e.g. aaa company).
After that, when other user of @<aaa company>.com domain who is registered with a different ICDm tenant (e.g. bbb company), tries to log in to ICDm, the user cannot log in because the login redirects to IdP set for aaa company.
This is as-designed behavior. Please contact Broadcom technical support for assistance with this issue.
SECP-18350