It seems that my recent problem upgrading to Notes 9 is now solved.
There's a new IBM Connections Plug-in for IBM Notes, release 4.5, with support for IBM Notes 9.0, available to download from IBM Greenhouse
To install it, in Windows, just close IBM Notes, uncompress the donwloaded file and locate the Windows installer.
To configure it, just click in "Show Connections preferences"
To connect,for instance, to the Greenhouse Connections server, just enter the Greenhouse host name, mail address and password. Clcik Apply and that`s it,
In my case, I was unable to connect.getting error messages
and strange errors at the log
|CLFNF0083E: An error occurred while saving the Connections account preferences|
|An internal error occurred during: "Load Connections Server Config information|
To solve it, open the local address book, check the Advanced section, and in the accounts view delete the Connections Account, that is where Notes saves the Connections credentials
Then do the configuration step again and that's it.