Microsoft Teams Connect shared channels is rolling out to public preview

ArunDas Are there any know issues where even if the OAuth JWT does not have the MFA claim, the external user is still given access to the shared channel ?

In my test, both Tenants have MFA enabled (via Conditional Access configured for All users, and Office 365 Apps.)

B2B Direct Connect setup between the respective tenants,

Both have the selection "Trust MFA auth from Azura AD tenants" 

1st test as above, the MFA claim is present and the shared channel functions and user can interact.

2nd test, MFA is disabled as a condition for the user to authenticate to their home tenant, and MFA claim is MISSING from the JWT token, but the user still get access to the shared channel and can interact.

amr : [ pwd  ]   ..........(note the missing "mfa")

and although you get some annoying prompts to get further authorization, you can still interact and read and write to the channel

("Writable 3" was written after a failed login)

ignore the above, and keep writing ....

Lots of errors in the OAuth tracer, due to missing MFA claim, but site still gives access