Teams, and SFB interop. Office 365 Teams user sends a chat message to on-prem SFB user, the chat message does not land in this SFB client, instead the user gets an email asking them to install Teams.

Hello Experts, I have Exchange 2013 CU21, with AD 2012 R2, on prem. We have Azure AD connect setup for synchronization of accounts to Office 365, and leverage pass-through authentication. We also have SFB 2015 on-prem and have setup SFB hybrid with SFB online. I would like to introduce Teams into the organization, but am having difficulty with the SFB and teams interoperability. When a user that has been migrated to O365 for E-mail and Skype, from their Teams, messages an on-prem SFB user, the chat message does not appear in their SFB client, instead the on-prem user receives an email saying someone is trying to contact them on Teams, and asks them to install Teams. I would like to have the message go straight to SFB client.

For the Teams Users, i have set the parameters as shown in attached pic: Capture1, and for the on-prem SFB user, i have set the parameters as shown in attached pic: Capture2, based on this Microsoft article: https://docs.microsoft.com/en-us/MicrosoftTeams/migration-interop-guidance-for-teams-with-skype

when the SFB user from on-prem messages the Office 365 user from their SFB client, then the O365 user receives it in Teams, and then they are able to chat with one another, but it seems that the Teams user cannot initiate the chat. However, if a Teams user from O365 Teams calls a user on-prem, then the calls comes in their SFB client which is good. but chat does not seem to be working as it should. Has anyone experienced this issue? Any guidance would be really helpful. thanks in advance.
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Newguy 123Asked:
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Neha AgarwalSenior Consultant-CGCommented:
Yes, team users will not be able to initiate the chat as you are using the mode  "SfBOnly" . From this mode only SFB users will be able to initiate the chat. If you want both users whether of teams or of SFB initiate the chat then use mode "Islands" and check
Let me know if it helps.
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Newguy 123Author Commented:
response from microsoft, they are currently looking into this it seems.
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Newguy 123Author Commented:
response from microsoft, they are currently looking into this it seems.
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