Hello @Britney_Edwards   This appears to be a bug - it's the topic of other past conversations in this community and you may want to read the solutions offered: https://gorovian.000webhostapp.com/?exam=t5/microsoft-teams/teams-chat-error-quot-administrator-has-disab...

 

This was also the topic on our answers.microsoft.com tech support site last year: https://answers.microsoft.com/en-us/msoffice/forum/msoffice_o365admin-mso_teams-mso_o365b/administra...

 

Hope these help.

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