Correction for Broken links across the repository

Author: SubbaReddi

getting-started/QUICKSTART.md

@@ -32,7 +32,7 @@ To get started, ensure that you have the following tools:
 | [Git](https://git-scm.com/downloads)                                                                                                                   | Git is a version control system that helps you manage different versions of code within a repository.                                                                                                                                                               |
 | [Microsoft Teams](https://www.microsoft.com/microsoft-teams/download-app)                                                                              | Microsoft Teams to collaborate with everyone you work with through apps for chat, meetings, and call-all in one place.                                                                                                                                              |
 | [Microsoft Edge](https://www.microsoft.com/edge) (recommended) or [Google Chrome](https://www.google.com/chrome/)                                 | A browser with developer tools.                                                                                                                                                                                                                                     |
-| [Microsoft 365 developer account](/microsoftteams/platform/concepts/build-and-test/prepare-your-o365-tenant)                                           | Access to Teams account with the appropriate permissions to install an app and [enable custom Teams apps and turn on custom app uploading](../../../concepts/build-and-test/prepare-your-o365-tenant.md#enable-custom-teams-apps-and-turn-on-custom-app-uploading). |
+| [Microsoft 365 developer account](https://developer.microsoft.com/en-us/microsoft-365/dev-program)                                           | Access to Teams account with the appropriate permissions to install an app and [enable custom Teams apps and turn on custom app uploading](https://learn.microsoft.com/en-us/microsoftteams/teams-custom-app-policies-and-settings). |
 
 <br/>
 

python/samples/02.messageExtensions.a.searchCommand/README.md

@@ -21,8 +21,6 @@ This sample shows how to incorporate a basic Message Extension app into a Micros
 
 > Note: this is not a chat bot and therefore the bot does not respond if you talk to it. Once it is installed in Teams, you can interact with it by selecting it's app icon in the chat compose area.
 
-![screenshot](./assets/screenshot.PNG)
-
 ## Setting up the sample
 
 1. Clone the repository