There is a sign language view for Microsoft Teams. The feature allows sign language users to select up to two other participants' videos to be fixed in a central location, which will allow signers to be seen throughout the meeting.
The feature can be enabled for all meetings or on a meeting-by-meeting basis, which is useful for signers. External interpreters can only be assigned to a meeting using the accessibility tab in the app settings if they are pre-assigned by your organization. Sign language interpreters are not provided by Microsoft.
Other call participants can see what other call participants can see.
Other participants can still be pinned without encroaching on the prioritized video streams of the signer. When a presentation is shared, the prioritized stream will shift but still retain a larger size and high quality. The sign language view is personal to the user and other call participants won't be notified.
There is a new sticky accessibility preferences section for teams. Users can easily change sign language view by default or pre-identifying preferred signers with the new pane. The sign language view and live caption can be quickly turned on or off.
If your organization has enabled it, sign language view and the new accessibility pane can be personally enabled in the public preview. The features will be rolled out to Teams desktop and web clients in the near future.