Remove-GraphGroupMember.ps1

function Remove-GraphGroupMember {
    <#
    .SYNOPSIS
    Removes Members from Azure AD Security Group or Microsoft 365 Group

    .DESCRIPTION
    Removes Members from Azure AD Security Group or Microsoft 365 Group

    .PARAMETER UserID
    This is the User's ID. This is the user to be removed from the group

    .PARAMETER GroupID
    This is the Group's ID. This is the group from where we want to remove members

    .PARAMETER InputObject
    This is the pipeline input.

    .EXAMPLE
    Remove-GraphGroupMember -UserID 7cb1e5fe-abcd-4579-a158-7a046d004ad4 -GroupID 47d34d2f-abcd-468b-aaf8-d342f29f56e5

    .EXAMPLE
    Import-Csv .\RemoveFromGroup.csv | Remove-GraphGroupMember -GroupID e1a8c7fd-abcd-4e85-8c62-c20b9f3b2d80 | Export-Csv .\Log.csv -nti

    .NOTES
    The minimum data in the csv file should be ID. These represent each the ID of each member you want to Remove from the group.

    Example CSV:

    if using a csv:

    Department	EmployeeID	    givenName	surname	mail	    DisplayName	Id
    Marketing	1201440	        Test	    101	        Test101@contoso.com	Test 101	27511368-abcd-4584-bfee-b55ebabc180c
    Marketing	1201440	        Test	    102	        Test102@contoso.com	Test 102	feb8188a-abcd-4379-81e7-0cf40a0543d4
    Marketing	1201440	        Test	    103	        Test103@contoso.com	Test 103	362e0092-abcd-4fc7-8a94-f5b9bb9e2ac0
    Marketing	1201440	        Test	    104	        Test104@contoso.com	Test 104	3ea5eb9b-abcd-4ac5-bc1d-b0afa2a2a2bb

    #>
    [CmdletBinding()]
    param (

        [Parameter(ParameterSetName = 'individual', Mandatory)]
        $UserID,

        [Parameter(ParameterSetName = 'pipeline', Mandatory)]
        [Parameter(ParameterSetName = 'individual')]
        $GroupID,

        [Parameter(ParameterSetName = 'pipeline', ValueFromPipeline)]
        $InputObject

    )
    begin {
        if ([datetime]::UtcNow -ge $RefreshTime) { Connect-GraphRefresh }

        $RestSplat = @{
            Uri         = "https://graph.microsoft.com/beta/groups/{0}/members/{1}/`$ref" -f $GroupID, $UserId
            Headers     = @{Authorization = "Bearer $Script:Token" }
            Method      = 'DELETE'
            Verbose     = $false
            ErrorAction = 'Stop'
        }
        try {
            $null = Invoke-RestMethod @RestSplat
            Write-Verbose ('Success:{0}' -f $UserId)
        }
        catch {
            Write-Verbose ('Failed:{0}' -f $UserId)
        }
    }
    process {
        foreach ($item in $InputObject) {

            if ([datetime]::UtcNow -ge $RefreshTime) { Connect-GraphRefresh }

            $RestSplat = @{
                Uri         = "https://graph.microsoft.com/beta/groups/{0}/members/{1}/`$ref" -f $GroupID, $item.Id
                Headers     = @{Authorization = "Bearer $Script:Token" }
                Method      = 'DELETE'
                Verbose     = $false
                ErrorAction = 'Stop'
            }
            try {

                $null = Invoke-RestMethod @RestSplat
                Write-Verbose ('Success:{0}' -f $item.Id)

                [PSCustomObject]@{
                    Action = 'Remove Member'
                    Result = 'SUCCESS'
                    User   = $item.Id
                    Group  = $GroupID
                    Log    = 'SUCCESS'
                }
            }
            catch {
                Write-Verbose ('Failed:{0}' -f $item.Id)
                [PSCustomObject]@{
                    Action = 'Remove Member'
                    Result = 'FAILED'
                    User   = $item.Id
                    Group  = $GroupID
                    Log    = $_
                }
            }
        }
    }
}