问题
Messages in MSTeam appears in group/team mailbox in Conversation History > Team Chat folder. In case of a team/channel message,I didn't see an attribute to determine channelID a message item is associated with. The subject of the message item have channelname (for channel other than general) but channelname can change. So subject is not reliable to derive the channel info.
Is there any attribute to retrieve the channelId given a msteam message item in exchange.
Here is the MS TEAM named test1/hello for which message is being captured in the mentioned folder
来源：https://stackoverflow.com/questions/49511756/how-to-get-a-channelid-from-an-exchange-item-created-for-msteam-team-messages