![V7] ISSUE: LAN manager authentication level must be 3 or higher (cannot create MS Exchange mail level backup) [Ahsay Wiki] V7] ISSUE: LAN manager authentication level must be 3 or higher (cannot create MS Exchange mail level backup) [Ahsay Wiki]](http://wiki.ahsay.com/lib/exe/fetch.php?media=public:5011_0.png)
V7] ISSUE: LAN manager authentication level must be 3 or higher (cannot create MS Exchange mail level backup) [Ahsay Wiki]
![LAN Manager authentication level must be 3 or higher on Exchange 2013 mailbox backup - BOBcloud Backups (desktop and server) - BOBcloud Forum LAN Manager authentication level must be 3 or higher on Exchange 2013 mailbox backup - BOBcloud Backups (desktop and server) - BOBcloud Forum](https://forum.bobcloud.net/uploads/default/original/1X/829a1886619c825045ee7d4e696e3d35351570fc.png)
LAN Manager authentication level must be 3 or higher on Exchange 2013 mailbox backup - BOBcloud Backups (desktop and server) - BOBcloud Forum
![Figure Network Security Settings LAN Manager Authentication Level Security Settings Policy - Managing Security Windows Server 2003 Figure Network Security Settings LAN Manager Authentication Level Security Settings Policy - Managing Security Windows Server 2003](https://www.serverbrain.org/managing-security-2003/images/1749_83_17.jpg)
Figure Network Security Settings LAN Manager Authentication Level Security Settings Policy - Managing Security Windows Server 2003
![Lesson 1: Supporting Earlier Versions of Windows Clients | MCSA/MCSE Self-Paced Training Kit (Exam 70-214): Implementing and Administering Security in a Microsoft Windows 2000 Network (Pro-Certification) Lesson 1: Supporting Earlier Versions of Windows Clients | MCSA/MCSE Self-Paced Training Kit (Exam 70-214): Implementing and Administering Security in a Microsoft Windows 2000 Network (Pro-Certification)](https://flylib.com/books/3/243/1/html/2/images/f07yo02.png)
Lesson 1: Supporting Earlier Versions of Windows Clients | MCSA/MCSE Self-Paced Training Kit (Exam 70-214): Implementing and Administering Security in a Microsoft Windows 2000 Network (Pro-Certification)
![group policy - getUserPrincipal() in JCIFS / Lan-Manager authentitation level setting in Windows 2k8 - Server Fault group policy - getUserPrincipal() in JCIFS / Lan-Manager authentitation level setting in Windows 2k8 - Server Fault](https://i.stack.imgur.com/bUPVi.jpg)
group policy - getUserPrincipal() in JCIFS / Lan-Manager authentitation level setting in Windows 2k8 - Server Fault
![System Requirements > Server side Requirements > Application Server Middleware (Servlet Engine) > Apache Tomcat > Recommended Servlet Engine (Tomcat) Configuration > Tomcat Security Settings System Requirements > Server side Requirements > Application Server Middleware (Servlet Engine) > Apache Tomcat > Recommended Servlet Engine (Tomcat) Configuration > Tomcat Security Settings](https://resources.weboffice.vertigis.com/Documentation/WebOffice10R3/HTML/secpol_ntlm_zoom80.png)