Upgrade from Microsoft Teams Free (classic) to Microsoft Teams
https://support.microsoft.com/en-us/office/upgrade-from-microsoft-teams-free-classic-to-microsoft-teams-29475bbd-a34f-4175-9b33-d44430f8ad39
WebIf you want to upgrade your Teams Free (classic) org to a different plan, such as Office 365 Enterprise E3, follow this process: Upgrade to Office 365 E3 using the instructions here. Log in to the admin portal after completing the upgrade process and follow the instructions at Switch to a different Microsoft 365 for business plan .
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