3745880 - IAG - Access Request Fails with 'User Doesn't Exist' - Case Sensitivity in User ID for C4C Application

In IAG, when raising an Access Request to remove a C4C the role is not being removed due to the following error:

• Group [GROUP_NAME] unassigned from user [USER_ID] ([User Full Name]) from business role [BUSINESS_ROLE_NAME]: Failed (User doesn't exist in system) — requested from Access Request with ID [REQUEST_ID]

• SAP Cloud Identity Access Governance 2.0 

iag, c4c, role removal, access request, repository sync, provisioning job, user mapping, case sensitivity, user doesn't exist in system, group unassign, business role, identity access governance, cloud for customer, connector mapping, deprovisioning failure, case sensitive , KBA , GRC-IAG-AR , Access Request Service , Problem