The 8.6.1 update addressed several specific bugs across the system:

: Fixed errors during the configuration of Google SMTP providers and corrected display values when toggling between legacy and OAuth methods for department mail.

: Corrected a payment recording issue for non-decimal currencies to prevent incorrect fractional credits.

: This version reached End-of-Life (EOL) on October 31, 2023 . It is no longer supported and does not receive security patches. Changelog & Technical Improvements

: Resolved multiple "Fatal Error" issues occurring in PHP 8.1 environments, specifically during server syncs, invoice generation with 100% discounts, and when certain suspension parameters were undefined.

Because version 8.6.1 is EOL, it is vulnerable to several newer security threats, including those addressed in the security update which targeted XSS and CSRF vulnerabilities.