End users are unable to log in to Symantec Mail Security for SMTP 5.0.1 or Symantec Brightmail Gateway user quarantine.
Invalid username or password. Please try again.
You have specified a fully-qualified domain name (FQDN) instead of a Windows Domain name in your Authentication source.
Change your LDAP Authentication source's "Windows Domain Names" to the Windows Domain Name (NETBIOS) instead of the FQDN.
If you have a domain enterprise.example.com, the NETBIOS name would be only ENTERPRISE. Netbios domain names are the leftmost label in the DNS domain name.
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