Update README.md

Co-authored-by: Abhishek Verma <[email protected]>

Author: manojmalik20

README.md

@@ -10,7 +10,7 @@
 
 This app acts as an intermediary between Mattermost and Microsoft Outlook by getting users' status updates from Mattermost and using those statuses to display users' presence information in Outlook. It is created by following the official Microsoft documentation which can be found [here](https://docs.microsoft.com/en-us/office/client-developer/shared/integrating-im-applications-with-office). It is a Windows application that can be installed through a wizard setup.
 
-**Note**: This application is only tested with MS Outlook 2016 and 2019.
+**Note**: This application is tested to be working properly with MS Outlook 2016 and 2019.
 
 ## Prerequisite