Hi @Kyle Morrow
MS Teams Voice doesn't seem to offer a way to differentiate internal vs external calls or route calls based on conditions like these.
To my knowledge currently it is not possible.
There have been a few threads on Teams feedback forum about this feature.
Please refer to the following links:
Differentiate between Internal Teams Calling and External Calling.
Voice calling: Internal Calling and External Calling Identification; Redirect only the external calls to voice mail
You may consider upvoting or leaving a comment to submit your feedback.
Thanks for your understanding.
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.