Uninstall Microsoft Teams cleanly - Nero Blanco IT Migration Specialists

<span id="hs_cos_wrapper_name" class="hs_cos_wrapper hs_cos_wrapper_meta_field hs_cos_wrapper_type_text" style="" data-hs-cos-general-type="meta_field" data-hs-cos-type="text" >Uninstall Microsoft Teams cleanly - Nero Blanco IT Migration Specialists</span>

Conrad Murray
22 January, 2020

Teams Cache Cleaner

Try this one last time…

Start PowerShell as Admin and run:

Set-ExecutionPolicy -ExecutionPolicy RemoteSigned -Scope Process
taskkill /IM teams.exe /F /T
Get-ChildItem -Path ([System.Environment]::ExpandEnvironmentVariables("%AppData%\Microsoft\Teams")) -Directory | ? { $_ -in ('blob_storage','Cache','Application Cache','Code Cache','databases','GPUCache','IndexedDB','') } | % {Remove-Item $_.FullName -Recurse -Force}
Get-ChildItem -Path ([System.Environment]::ExpandEnvironmentVariables("%AppData%\Microsoft\Teams\meeting-addin")) -Directory | ? { $_ -in ('Cache','') } | % {Remove-Item $_.FullName -Recurse -Force}
Get-ChildItem -Path ([System.Environment]::ExpandEnvironmentVariables("%AppData%\Microsoft\Teams\Service Worker")) -Directory | ? { $_ -in ('CacheStorage','ScriptCache','') } | % {Remove-Item $_.FullName -Recurse -Force}

AutoStart Settings

Go to Teams and set it to not auto-start, nor open in background, or stay open when running and don’t have it set for chat app.

Once Teams is uninstalled cache files cleared and registry cleared, these should be moot.

Uninstall Teams

Quit Teams by right-clicking the Teams icon in the taskbar and choosing Close window.
In Windows, click on the Start button Start button , > Settings > Apps.
Under Apps & features, search “teams”.
Highlight Microsoft Teams, then select Uninstall
A box will appear, then again select Uninstall to confirm. A new box will appear, asking Do you want to allow this app to make changes to your device? Select Yes.
Now select Teams Machine-Wide Installer, click Uninstall. Then follow the same process described in step 5
Delete any remnant cache files

Delete Cache and other files

C:\Users\[USERNAME]\AppData\Local\Microsoft

C:\Users\[USERNAME]\AppData\Roaming\Microsoft

C:\Users\[USERNAME]\AppData\Roaming

Or Add/Remove Programs

Delete Teams Installer

C:\Program Files (x86)\Teams Installer

Delete Teams Installer

When the going gets tough – pull out the sledgehammer to crack a nut

Only move to this section if a simple uninstall and re-install didn’t work

Registry

Search Registry and CAREFULLY evaluate and delete any residual keys for Teams or “Microsoft Teams”

Log out of Microsoft Office

Go to Word

File\Account

Clear Credentials

Control Panel\User Accounts\Credential Manager

Remove User from Access Work & School

Rename the AAD BrokerPlugin

Run with elevated PowerShell

Rename the AAD BrokerPlugin directories to try to avoid TPM errors when using Office

taskkill /IM teams.exe /F /T
taskkill /IM outlook.exe /F /T

$ProfilesDirectoryPath = (Get-ItemProperty -Path "registry::HKLM\Software\Microsoft\Windows NT\CurrentVersion\ProfileList" -Name ProfilesDirectory).ProfilesDirectory
$ProfileDirectories = Get-ChildItem -Path $ProfilesDirectoryPath -Directory
$UniqueRenameKey = ([guid]::newguid()).tostring().replace('-','')
try{
$Renames = (Get-ItemProperty 'registry::HKLM\SYSTEM\CurrentControlSet\Control\Session Manager' -Name PendingFileRenameOperations -ErrorAction SilentlyContinue).PendingFileRenameOperations
if( $Renames ) {
$Renames = $Renames | ? { $_ -notlike 'Microsoft.AAD.BrokerPlugin_' }
}
} catch {
}
if( -not $Renames ) {
$Renames = @()
}
Foreach( $ProfileDirectory in $ProfileDirectories ) {
$AppDataPackagesPath = ('{0}\AppData\Local\Packages' -f $ProfileDirectory.FullName )
if( Test-Path $AppDataPackagesPath ) {
$MicrosoftAADBrokerPluginPackages = Get-ChildItem $AppDataPackagesPath -Directory -Filter 'Microsoft.AAD.BrokerPlugin_*'
Foreach( $MicrosoftAADBrokerPluginPackage in $MicrosoftAADBrokerPluginPackages ) {
$Renames += ('\??{0}' -f $MicrosoftAADBrokerPluginPackage.FullName)
$Renames += ('\??{0}{1}' -f $MicrosoftAADBrokerPluginPackage.FullName, $UniqueRenameKey) } } $UserClassPath = ('{0}\AppData\Local\Microsoft\Windows\UsrClass.dat' -f $ProfileDirectory.FullName )
if( Test-Path $UserClassPath ) { $Renames += ('\??{0}' -f $UserClassPath)
$Renames += ('\??{0}{1}' -f $UserClassPath, $UniqueRenameKey)
}
}
if( $Renames ) {
try{
$DontSave = Get-ItemProperty 'registry::HKLM\SYSTEM\CurrentControlSet\Control\Session Manager' -Name PendingFileRenameOperations -ErrorAction SilentlyContinue
Set-ItemProperty 'registry::HKLM\SYSTEM\CurrentControlSet\Control\Session Manager' -Name PendingFileRenameOperations -Value $Renames
} catch {
New-ItemProperty 'registry::HKLM\SYSTEM\CurrentControlSet\Control\Session Manager' -Name PendingFileRenameOperations -Value $Renames -PropertyType MultiString | Out-Null
}
}

REBOOT

Does Teams automatically reinstall?

No? Good

Reinstall Teams

Go to https://teams.microsoft.com log in and re-install

Conrad Murray

Conrad Murray is a Microsoft Certified IT consultant working in IT for over 20 years specialising in the Messaging arena and in particular Office 365 and previously Microsoft Exchange On-Premises and IBM Domino. Working with like minded colleagues now delivering very large scale complex migrations from Office 365 to Office 365 (tenant to tenant), Lotus Notes and On-Premises Microsoft Exchange to Office 365.