Conversational Integration with Teams: Microsoft is continuously sending installationUpdate events to instances that are set up with a pre-configured bot. Description It has been observed recently that a significant number of conversations are automatically starting in Teams.This occurs when the Virtual Agent App is installed for the first time on a user's Teams profile. When this happens, Microsoft sends an 'installationUpdate' event to the instance, which interprets it as a 'help' command and displays the help contextual action information to the user. This behavior should only happen once, or if the app is removed and then reinstalled. Steps to Reproduce There are no specific Steps to reproduce this issue ,users on Teams randomly receive a welcome message with help information.WorkaroundThis problem is currently under review and targeted to be fixed in a future release. Subscribe to this Known Error article to receive notifications when more information will be available. Meanwhile you can apply this workaround in your instance. Welcome message can be completely disabled by commenting out the second line and adding the provided line in the VATeamsExtensionPoint script.While applying these changes, set 'replace_on_upgrade' to true for this file in sys_update_xml to avoid any issues with future app updates. 1. Comment out the script include"VATeamsExtensionPoint" as per the code below: if (responseMsg === 'installationUpdate') {//return sendMessageToVA(providerAppId, activity, body, authToken); return ''; //Add this line} 2. Once the change is made on the script include please go to sys_update_xml and find the relevant record for "VATeamsExtensionPoint" and set 'replace_on_upgrade' to true on the list view. Note: This issue occurred due to an outage from MSFT, which has now been resolved on Microsoft's end. Additionally, we are implementing a defense mechanism to manage unusually large volumes of incoming messages, which will be included in the Q2 Store release in June.Related Problem: PRB1991955