Active Directory Windows Server 2025 not Authenticate Users

Hi

Thank you for Reply . yes i upgraded UTM to Version 21

My Appliance is Sophos XGS 2300 with SFOS 21 

My Appliance is Sophos XGS 2300 with SFOS 21 

Hi Masoud Hemmati , could you please log a service request and provide me the case id here, we'll expedite the given siuation with the support team...

Hello, I found the solution. The following changes must be made in the Active Directory server in the domain controller policies.

Default Domain Controller Policy > Computer Configuration > Policies > Windows Settings > Security Settings > Local Policies> Security Options
1. Domain member: Digitally encrypt or sign secure channel data (always) —> None
2. Domain controller: LDAP server signing requirements —> None