To retrieve all Microsoft Teams in your tenant using PowerShell, you can use the Microsoft Teams PowerShell module. Here's a PowerShell script to accomplish this task:

# Install and import the Microsoft Teams PowerShell module (if not already installed)
# Install-Module -Name PowerShellGet -Force -AllowClobber -Scope CurrentUser
# Install-Module -Name MicrosoftTeams -Force -AllowClobber -Scope CurrentUser
# Import-Module MicrosoftTeams

# Connect to Microsoft Teams with administrative credentials
Connect-MicrosoftTeams

# Get a list of all Microsoft Teams in the tenant
$teams = Get-Team

# Display information about each team
foreach ($team in $teams) {
    Write-Host "Team Display Name: $($team.DisplayName)"
    Write-Host "Team ID: $($team.GroupId)"
    Write-Host "------------------------"
}

# Disconnect from Microsoft Teams
Disconnect-MicrosoftTeams

Instructions:

In this script:

1. First, you should install and import the Microsoft Teams PowerShell module if it's not already installed. Uncomment the Install-Module and Import-Module lines if you need to install the module.
2. Connect to Microsoft Teams using Connect-MicrosoftTeams. You'll be prompted to sign in with administrative credentials.
3. Retrieve a list of all Microsoft Teams in the tenant using Get-Team.
4. Loop through the list of teams and display information about each team, such as the display name and group ID.
5. Finally, disconnect from Microsoft Teams using Disconnect-MicrosoftTeams.

After updating the script, save it as a .ps1 file and run it using PowerShell. Make sure you have the necessary permissions to access Microsoft Teams in your tenant, as administrative credentials might be required.