原本在使用Teams會議時，沒帳號的來賓，也可以透過"聊天"功能用文字聊天。但最近突然不能用。
在測試時，卻發現有時後可以，有時後不行，仔細比對操作方式，發現了為何會有這種狀況。
Teams的會議有分頻道會議跟一般會議，發起會議的地方在不同的頁面上，通常發起會議都是頻道會議，因為登入後的畫面就是會在發起頻道會議的地方。
1.在"團隊"裡建立的會議，不管是排程或立即開會，都是頻道會議。來賓是無法使用文字聊天。
2.在"行事曆"裡建立的會議，不管是排程或立即開會，都是一般會議。來賓是可以使用文字聊天。
其他差異可參考 https://atlas.utdallas.edu/TDClient/30/Portal/KB/ArticleDet?ID=300
Guests in Teams meetings are unable to chat via text.
Originally, during Teams meetings, guests without an account could also engage in text chat using the "Chat" feature. However, recently this capability suddenly became unavailable.
During testing, it was observed that sometimes it worked, while other times it didn't. After carefully comparing the steps taken, the reason for this situation was identified.
Teams meetings can be categorized as channel meetings or regular meetings, and the location for initiating a meeting is different on the interface. Typically, meetings are initiated as channel meetings because upon logging in, the interface is directed to the channel meeting initiation section.
Meetings created within "Teams" are always channel meetings, regardless of whether they are scheduled or started immediately. Guests cannot use text chat in these meetings.
Meetings created within the "Calendar" are always regular meetings, regardless of whether they are scheduled or started immediately. Guests can use text chat in these meetings.
