Follow the steps from this link to make a backup of your AutoSys and WCC applications in EEM...https://techdocs.broadcom.com/content/broadcom/techdocs/us/en/ca-enterprise-software/intelligent-automation/workload-automation-ae-and-workload-control-center/11-3-6-SP8/securing/ca-eem-security-data-replication-backup-and-migration/capture-a-copy-of-your-ca-eem-security-policies.html
From the EEM server, backup all *.key and *.cer files from the $IGW_LOC directory and store them somewhere to be restored after the reinstall. This step will prevent having to regenerate EEM certificates in each application after the reinstall.
Uninstall and reinstall EEM using the Common Components iso image.
Restore the AutoSys and WCC applications to EEM by copying the xml files created from the first step above and feeding each of them to this command on the EEM server...
$EIAM_HOME/bin/safex -h <eem_server_hostname> -u EiamAdmin -p <EiamAdmin_password> -f <backup_xml_file>
Go to $IGW_LOC and remove all *.key and *.cer files. Copy in the backup of these files that you made prior to the EEM reinstall.
Stop and restart both CA Directory (dxserver) and igateway services.