Feb 03 2021
I am starting the migration of users from S4B on prem to Teams and i have noticed when i migrate a user to Teams only, their presence from a S4B user using the S4B client is unknown.
Further the S4B user cannot call or message a Teams only user. Teams to Teams is fine.
Configured S4B in hybrid mode.
Default co existence is islands mode.
Looked through this document and it should work