I have verified the password used in the encryption job but still receive invalid credentials messages when trying to validate from the Control Center Setting panel. In the XCOM log I see Top Secret messages prior to the XCOM error message:
XCOMM1610I Control Center Connection Established
TSS7102E Password Missing
TSS7102E Password Missing
XCOMM1612E Invalid credentials
Release : 12.0
Component : CA XCOM Data Transport for z/OS
Problems copying the encrypted password.
You must make sure that you copy & paste the full encrypted password string into the "XCOM-Encrypted Password" field on the Settings tab of Control Center.
When you run the XCOMENCR job to encrypt the password it will write the encrypted password to a sequential, PDS member dataset, or SYSOUT. The contents of the dataset/SYSOUT will look like this:
PASWORD=E773987CB11852147F1E4034EC96BAA2FB86AF8EEE78BB9E0D87AB93F97A9D9F0999AC
Make sure to copy the full encrypted string starting after "PASSWORD=". Depending on your emulator you may want to scroll to the right to make sure you have the full encrypted string before you paste it in the Settings tab field.