Subscription-manager registration fails with "HTTP error (401 - Unauthorized): Service not available, please try again later"

Solution Verified - Updated -

Issue

  • subscription-manager registration fails with "HTTP error (401 - Unauthorized): Service not available, please try again later"
[root@localhost ~]# subscription-manager register
Registering to: subscription.rhsm.redhat.com:443/subscription
Username: userA
Password: 
HTTP error (401 - Unauthorized): Service not available, please try again later

Environment

  • Red Hat Enterprise Linux

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