MS Teams Media Bypass Mode OFF is currently supported.

MS Teams P-Asserted-Identity (PAI) header is currently not supported by OS4K and must be disabled from MS Teams SBC Direct routing configuration.

There is no phone display update after transfer (and forward scenarios) as Teams does not send PAI in the 200OK event (even if ForwardPAI is activated on tenant). Additionally, it also neglects the PAI received from the other side. Teams reads the display information from the “FROM” header.

History-info header is not yet supported by OpenScape 4000. (affects forward, parallel ringing scenarios)

In a conference call, the display is not updated which is a limitation of native SIP trunk.