I mentioned before that I was able to join my machine to the active directory after updating the /etc/krb5.conf. However, there was still an error even though the join had been successful. The error was:
No DNS domain configured for mymachine. Unable to perform DNS Update. DNS update failed!
I found an article about how to fix this problem. The fix is to modify the 127.0.0.1 entry in the /etc/hosts file. I have mine like this:
127.0.0.1 mymachine.mycompany.com mymachine
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