If you have integrated OIM and OIA and they are in the different domain then you will encounter the issue while running the import jobs.
We need to establish trust between the 2 domains as below .
Navigate to Home > Domain > Security, and check Cross Domain Security is Enabled.
Click Advanced, enter the desired password in the Credential and Confirm Credential fields, and click Save.
Repeat this configuration change for both domains using the same password value.
Restart both Oracle WebLogic Servers.