Hi @JulieMardersdw214 ,
Yes it is possible, this was asked last year in another thread, you may refer to it:
https://learn.microsoft.com/en-us/answers/questions/163321/ms-teams-integration-with-skype-for-business-2015.html
For more information, also refer to the documentation over here:
Understand Microsoft Teams and Skype for Business coexistence and interoperability
https://learn.microsoft.com/en-us/microsoftteams/teams-and-skypeforbusiness-coexistence-and-interoperability
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Best regards,
Leon