Additional sign-in or account-related issues within Microsoft Teams for business
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Could you confirm which Microsoft 365 Business subscription you purchased (Business Basic, Business Standard, or Business Premium)?
You mentioned it does not have Teams license, when you set up a business account, did you choose With Teams or Without Teams?
If you chose Without Teams, the account will not have a Microsoft Teams license assigned. To access Teams, a Teams-enabled license must be assigned to the account, such as Microsoft 365 Business Basic (with Teams) or Teams Essentials, or another subscription that includes Microsoft Teams.
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