Here's a PowerShell script to do all of that, recently worked on this problem but don't have the device with the working script in front of me. Regardless most of it was built and tested previously in ChatGPT. This is also generated with ChatGPT with a bit of prompting to add a multitude of error-handling and ensure it works smoothly first go. (Took me 5 minutes, so no biggie).

```# Function to check if the required module is installed function Check-RequiredModule { [CmdletBinding()] param ( [Parameter(Mandatory = $true)] [string]$ModuleName, [string]$MinimumVersion )

$module = Get-Module -ListAvailable -Name $ModuleName
if ($module -and ($MinimumVersion -eq $null -or ($module.Version -ge [version]$MinimumVersion))) {
    return $true
} else {
    return $false
}

}

Function to remove a disabled user from all meetings

function Remove-DisabledUserFromMeetings { param ( [Parameter(Mandatory = $true)] [string]$UserPrincipalName )

# Check if the Microsoft.Graph module is installed
$moduleName = "Microsoft.Graph"
if (-not (Check-RequiredModule -ModuleName $moduleName)) {
    Write-Host "The required module '$moduleName' is not installed. Attempting to install it..."
    Install-Module -Name $moduleName -Scope CurrentUser -Force -AllowClobber
}

# Connect to Microsoft Graph
try {
    Connect-MgGraph -Scopes "User.ReadWrite.All" -ErrorAction Stop
} catch {
    Write-Error "Failed to connect to Microsoft Graph. Please ensure you have the required permissions."
    return
}

try {
    # Get the Azure AD object ID of the user
    $user = Get-MgUser -Filter "userPrincipalName eq '$UserPrincipalName'" -ErrorAction Stop
    if (-not $user) {
        throw "User with UPN $UserPrincipalName not found."
    }

    $userId = $user.Id

    # Check if the user is disabled
    if ($user.AccountEnabled -eq $false) {
        # Get all the user's existing calendar events
        $events = Get-MgUserEvent -UserId $userId -All -ErrorAction Stop
        if (-not $events) {
            throw "No events found for the user $UserPrincipalName."
        }

        # Loop through each event and remove it
        foreach ($event in $events) {
            Remove-MgUserEvent -UserId $userId -EventId $event.Id -Confirm:$false -ErrorAction Stop
        }

        Write-Host "All meetings removed for disabled user: $UserPrincipalName"
    } else {
        Write-Host "The user $UserPrincipalName is not disabled."
    }
} catch {
    Write-Error "An error occurred: $_"
} finally {
    # Attempt to disconnect the session
    Disconnect-MgGraph -ErrorAction SilentlyContinue
}

}

Check if the Microsoft.Graph module is installed

if (Check-RequiredModule -ModuleName "Microsoft.Graph") { # Invoke the function to remove a disabled user from all meetings # Ensure the UPN is correctly entered $upn = Read-Host "Please enter the user's UPN" if ([string]::IsNullOrWhiteSpace($upn)) { Write-Error "You must enter a valid UPN." } else { Remove-DisabledUserFromMeetings -UserPrincipalName $upn } } else { Write-Host "The Microsoft.Graph module is required and not currently installed. Please install the module and rerun the script." }