问题
I was using Microsoft graph API for installing the bot for a user https://graph.microsoft.com/beta/users/{userID}/teamwork/installedApps
On installing the bot, onTeamsMemberAddedEvent() was called for the personal scope as well as for teams scope and through that, I was sending the welcome message to the users. Apart from graph api, I was also installing the bot directly and the function was getting revoked.
But now, this event is not getting called and I am unable to get conversationId from the personal scope of a user. It is working for teamscope only.
来源：https://stackoverflow.com/questions/62953661/onteamsmemberaddedevent-not-working-for-personal-scope