Accessing Microsoft Teams using organizational or personal credentials
Hi @Chris Lee
Having an active Microsoft account does not automatically mean you have access to Microsoft Teams. Teams requires a valid Teams-enabled license to be assigned to your account.
Could you please provide the following information:
Are you able to sign in to https://teams.cloud.microsoft using your corporate account? Do you meet this issue on Teams web, Teams desktop or both?
Could you please sign in to the following page with your corporate account and check whether Microsoft Teams is listed under your subscriptions? https://portal.office.com/account/?ref=Harmony#subscriptions
Once signed in, navigate to Subscriptions and look for any license that includes Microsoft Teams (such as Microsoft 365 Business Premium, E3/E5, Teams Essentials/Enterprise, etc.).
If no Teams license is listed there, Ask the IT admin of your company to assign a Teams license via Admin center.