Login to your remote-clusters and run ktutil. In this example, username is hoa and realm is SAIKOCAT.COM
[hoa@remote-clusters ~]$ ktutil
ktutil: addent -password -p [email protected] -k 1 -e aes256-cts
Password for [email protected]:
ktutil: addent -password -p [email protected] -k 1 -e rc4-hmac