I encountered a few things that should be probably changed.

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CHAPTER 15. AUDITING AND EVENTS
15.1.1. Event Types
Account events:
Send Password Reset - A password reset email has been sent.

---the text is "Send Password Reset", but the actual event in admin console is named SEND_RESET_PASSWORD
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CHAPTER 15. AUDITING AND EVENTS
15.1.1. Event Types
Account events:
Social Link - An account has been linked to a social provider.
Remove Social Link - A social provider has been removed from an account.

---the text is "Social Link", but I couldn't find such event in the admin console, only SEND_IDENTITY_PROVIDER_LINK or FEDERATED_IDENTITY_LINK (the same with Remove Social Link)
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CHAPTER 16. EXPORT AND IMPORT
Red Hat Single Sign-On has the ability export and import the entire database.

---should be "to export and import"
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17.1. THEMEABLE
See the Server Developer Guide for more details. == Threat Model Mitigation

---probably something wrong with ". == " and it should be a headline ?
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17.4. SSL/HTTPS REQUIREMENT
If you do not use SSL/HTTPS for all communication between the Red Hat Single Sign-On auth server and the clients it secures you will be very vulnerable to man in the middle attacks.

— I would use "secures, you", it's less confusing
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17.7. COMPROMISED ACCESS AND REFRESH TOKENS
This might seem like a no-brainer, but since Red Hat Single Sign-On does not have SSL enabled by default, many naive admins might not realize they have to do this.

---may seem a little offensive to use the term "naive admins"
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17.9. OPEN REDIRECTORS
It is important that clients and applications register as specific a URI pattern as possible to mitigate open redirector attacks.

---I would use "as specific URI pattern as possible"
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CHAPTER 17. USER ACCOUNT SERVICE

---the screenshots for Account Service, Password Update, OTP Authenticator, Federated Identity, Sessions, Applications (from User Account Service page) have "English" next to the "Back to Security Admin Console" link, I didn't see the language choice when I opened it.