garrytrinder/Remove-WikiTabFromChannel.ps1

## Remove-WikiTabFromChannel.ps1
[CmdletBinding()]
param (
    [Parameter(Mandatory = $true)]
    [string]
    $groupMailNickname,
    [Parameter(Mandatory = $true)]
    [string]
    $channelName
)

$ErrorActionPreference = 'Stop'

$groups = o365 aad o365group list --query "[?mailNickname=='$groupMailNickname'].{id:id}" -o json | ConvertFrom-Json
if ($null -eq $groups) { Write-Error "A team with the mailNickname $groupMailNickname was not found" }

$channels = o365 teams channel list --teamId $groups[0].id --query "[?displayName=='$channelName']" -o json | ConvertFrom-Json
if ($null -eq $channels) { Write-Error "A channel with the name $channelName was not found in the team" }

$tabs = o365 teams tab list --teamId $groups[0].id --channelId $channels[0].id --query "[?teamsApp.id=='com.microsoft.teamspace.tab.wiki']" -o json --pretty | ConvertFrom-Json
if ($null -eq $tabs) { Write-Error "A Wiki tab was not found on the channel" }

$token = o365 util accesstoken get -r "https://graph.microsoft.com" --new

$tabs | ForEach-Object {
    $options = @{
        Method  = "Delete"
        Uri     = "https://graph.microsoft.com/v1.0/teams/$($groups[0].id)/channels/$($channels[0].id)/tabs/$($_.id)"
        Headers = @{
            "Authorization" = "Bearer $token"
        }
    }
    try {
        Invoke-RestMethod @options
        Write-Host "Wiki Tab was succesfully removed from channel" -ForegroundColor Green
    }
    catch {
        Write-Host "There was an issue removing Wiki Tab from the channel"
        Write-Host $_.Exception.Message
    }
}