It specifically addresses AD issues:
macOS Mojave 10.14.3 Update
This update improves the security, stability, and compatibility of your Mac and includes the following enterprise content: When making a file-sharing connection that uses a valid Kerberos TGT to authenticate, users are no longer prompted to enter credentials.
We also encountered an "use old password"-issue where some users had to use their old password (primarily while off-network). That issue was addressed in 10.14.4:
That fix should also apply to FileVault-encrypted devices where "use old password"-issues have occurred.