If you setup Zenoss to authenticate over LDAP to an Active Directory domain controller using the instructions found on this page here are some possible problems you’ll encounter

• System : Zenoss running on Zope
• Zope LDAP integration software : LDAPUserFolder and LDAPMultiPlugins and python-ldap

If the user attempting to login to Zenoss / Zope using their Active Directory credentials has a double quote character ( “ ) in their password, authentication will fail.