Here, it explains how to install ChatPlus to Microsoft Teams.
How to add Chatplus
(1)Log into Microsoft Teams and click [App] on the left side of the screen. 
(2)Enter [Chatplus] and search for ChatPlus app. 
(3)Choose [Add to teams] and add searched ChatPlus app. 
(4)Choose channel and click [Tab setting]. 
(5)In ChatPlus App setting, you can choose either English or Japanese, and it would automatically change language by clicking the pull down. Enter each [Contract ID] and [Site ID]. ※By default, it is going to be ChatPlus' support chat window.
Check your [Contract ID] and [Site ID]
Here is how you can check for your contract ID and site ID. (1)Click the setting button on the upper right of the management page. 
(2)Click [General] on the left side of the page. 
(3)In the section "Chat window", you can see [Contract ID] and [Site ID] after d["__cp_c"]= within the code shown. In this case, [Contract ID] is [f8822191] and [Site ID] is [1]. 
(6)[ChatPlus] tag will be added and the chat window will be displayed. 
Delete Chatplus
(1)Click [ChatPlus] tab and from the menu, click [Delete]. 
(2)Click [Team]>[App] tab, choose [ChatPlus] and click [Bin] icon. 
(3)From the button [Other App] click the link [Display all] and click [Delete] from the ChatPlus menu. 
Mail: support@chatplus.jp
TEL: +81-50-8882-5558