You are deploying Microsoft Skype for Business 3PIP phones to remote sites for use with Microsoft Teams.
You need to sign each 3PIP phone in to Teams.
What are two possible ways to achieve the goal? Each correct answer presents a complete solution.
NOTE: Each correct selection is worth one point.
To sign a 3PIP phone into Microsoft Teams, it is possible to instruct a local user to sign in using the device itself or to sign in from the web. These methods leverage the device's built-in capabilities to connect directly to Teams or use a web interface for authentication. Using USB or DID number and PIN is not standard practice for such devices, nor is remote provisioning through the Teams admin center for this device type.
I think C & E are correct. Remote provisioning is only available on native Teams Phones afaik.
I agree, found this: 3PIP Phone Interop with Microsoft Teams - Authentication: All Skype for Business sign-in capabilities are only supported with username auth and web sign in. Pin Auth is not supported.