If you are IT admin or someone who is managing multiple Office 365 tenant, then you will come to a switch where you may needed to access the Microsoft Teams details for different Office 365 organization.
In the earlier version of Microsoft Teams meeting switching between Microsoft Account in Microsoft Teams was a bit difficult.
Now Microsoft Teams include a button Account & Orgs Which can be used to add multiple Microsoft Account and switch between it.
How to switch Account in Microsoft Teams desktop App
Login to Microsoft Teams desktop App in your device and click on the Profile Image as shown in the below image.
In the drop down option click on Accounts & orgs button as shown in the below image.
Here you will see an option Add personal account click on this button to add your Microsoft personal account.
If you have already added any Microsoft Account you will be shown here.
When you click on Add personal account, you will be prompt to sign in to Microsoft Teams desktop app with your personal Microsoft account.
Provide your Microsoft account username and credential and click next.
After submitting your credential you will be automatically switched to another account in your Microsoft Teams desktop App.