"TeamsAppId" Property Missing from Extracted Schema File for Teams.

Reporting an Issue or Missing Feature

Issue

Expected behavior

To be able to extract a Teams configuration from an existing Team and then re-provision from that extracted template.

Actual behavior

Trying to re-provision from an extracted template results in errors:

Invoke-PnPTenantTemplate : The required attribute 'TeamsAppId' is missing.
At line:1 char:1
+ Invoke-PnPTenantTemplate -Path .\sometemplate.xml
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : SyntaxError: (:) [Invoke-PnPTenantTemplate], XmlSchemaValidationException
    + FullyQualifiedErrorId : TEMPLATENOTVALID,PnP.PowerShell.Commands.Provisioning.Tenant.InvokeTenantTemplate

This relates to the "TeamAppId" property missing from the extracted schema for each of the "Tabs" defined. (https://docs.microsoft.com/en-us/graph/teams-configuring-builtin-tabs)

<pnp:Tab DisplayName="WebSite" ID="fdf0fc44-4eca-43e8-b8e1-932f7a60f1f7" Remove="false">
  <pnp:Configuration EntityId="" ContentUrl="https://www.somewebsite.co.uk" RemoveUrl="" WebsiteUrl="https://www.somewebsite.co.uk" />
</pnp:Tab>

needs to be similar to:

<pnp:Tab DisplayName="WebSite" TeamsAppId="com.microsoft.teamspace.tab.web" ID="fdf0fc44-4eca-43e8-b8e1-932f7a60f1f7" Remove="false">
  <pnp:Configuration EntityId="" ContentUrl="https://www.somewebsite.co.uk" RemoveUrl="" WebsiteUrl="https://www.somewebsite.co.uk" />
</pnp:Tab>

Steps to reproduce behavior

Extract a PnP Tenant Template using a configuration file that looks like:

{
    "$schema": "https://aka.ms/sppnp-extract-configuration-schema",    
    "tenant": {
        "teams": {          
            "includeGroupId": false,            
            "includeMessages": false
        }
    },
    "handlers": [
        "Tenant"
    ]
}

Issue the command for the SPO site that supports the Team and save it as an XML schema file::

$template = Get-PnPTenantTemplate -SiteUrl https://m365x123456.sharepoint.com/sites/PROV002 –Configuration "configTeams.json" -AsInstance
Save-PnPTenantTemplate -Force -Template $template -Out sometemplate.xml

Invoke the template:
Invoke-PnPTenantTemplate -Path .\sometemplate.xml

What is the version of the Cmdlet module you are running?

1.7.17 (nightly)

Which operating system/environment are you running PnP PowerShell on?

• Windows
• Linux
• MacOS
• Azure Cloud Shell
• Azure Functions
• Other : please specify

Start by tracing the Get-PnPTenantTemplate extraction path for Teams tabs, then compare its output with Invoke-PnPTenantTemplate validation. Reproduce the issue using the provided configuration and XML examples. Done means an extracted template includes the required TeamsAppId for each tab and can be invoked without the reported schema error.