The Exchange notes connectors doesn't work. i found the below error evet 8027. the message show the LDAP cannot connect to the removed DC.
Recently, I just upgade to all DC to Windows 2k8 from Window 2003. Also, all the windows 2003 DC was demote. i don't know why the notes connector seem to connect the removed DC.
The global catalog server that the connector tries to contact to obtain updates is stored in the msExchServer1NetworkAddress attribute. Please try to upate it maually by follow below KB.