Sametime Chat server for Windows SSO with Domino

If you want to have SSO between Domino and Sametime 12.0.1 FP1 or above you need to create the Web SSO document in Domino using “LTPA Token 2” as token format, instead of “LTPA Token and LTPA Token2” as was common in previous versions of Sametime.
This because HCL, starting with  Sametime 12.0.2 FP1 disabled LTPA V1 token support by default – in favor of LTPA V2 which is more secure.

On the Sametime server open the file custom.env and make you see this at the end
ENABLE_LTPA=true
LTPA_KEYS=C:\Sametime\ltpa.keys  <- replace with the location of your LTPA key file
LTPA_KEYS_PASSWORD=XXXXXX <- replace with your key password

Open the sametime.ini file and change the line

ST_AUTH_TOKEN=Jwt (this is the default)
to
ST_AUTH_TOKEN=Fork:Jwt,Ltpa

Restart the Sametime server.