Open Teams and check the top right hand side. Next to your name there should be the Organization/Tenant name.

Click the drop down arrow and select 'Munster Technological University' from the list of Organizations/Tenants


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Once selected, Teams will close and automatically reopen on the MTU Tenant. You should now have access to the assigned Teams and Channels.

Any issues, please take some screenshots of the errors/issues and let me know