Event ID - 1220

Event Id1220
SourceActive Directory
DescriptionLDAP over SSL will be unavailable at this time because the server was unable to obtain a certificate.
Event InformationAccording to Microsoft:
This event is logged when a server application (for example, Active Directory) attempts to perform a Secure Sockets Layer (SSL) connection, but no server certificate is found. Server certificates are either enrolled for by hand or are automatically generated by the domains enterprise Certificate Authority (CA). In domains where no enterprise CA exists, this is an expected event and you can safely ignore the message.
Reference LinksWindows Operating System

Object Picker cannot open because no locations from which to choose objects can be found error message when you try to select objects from an Active Directory domain in Windows 2000

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