As the message payload format received from Skype for business is missing "sourceEvent", type error occurred to the middleware when reading property 'clientActivityId' in TextMiddleware.toReceivable function.
Attached the logs as below.
2017-09-12T16:41:04.255185294Z [Tue Sep 12 2017 16:41:04 GMT+0000 (UTC)] INFO hubot-botframework-adapter: onBotEvents
2017-09-12T16:41:04.255237694Z [Tue Sep 12 2017 16:41:04 GMT+0000 (UTC)] INFO hubot-botframework-adapter: Handling activity Channel: skypeforbusiness; type: message
2017-09-12T16:41:04.255245394Z [Tue Sep 12 2017 16:41:04 GMT+0000 (UTC)] INFO hubot-botframework-middleware: creating middleware...
2017-09-12T16:41:04.255252294Z [Tue Sep 12 2017 16:41:04 GMT+0000 (UTC)] INFO hubot-botframework-middleware: TextMiddleware toReceivable
2017-09-12T16:41:04.257131076Z TypeError: Cannot read property 'clientActivityId' of undefined
2017-09-12T16:41:04.257190876Z at TextMiddleware.toReceivable (/var/www/chatbot-core/node_modules/hubot-botframework/src/middlewares.coffee:56:77)
2017-09-12T16:41:04.257201576Z at BotFrameworkAdapter.handleActivity (/var/www/chatbot-core/node_modules/hubot-botframework/src/adapter.coffee:70:41)
2017-09-12T16:41:04.257208576Z at BotFrameworkAdapter.onBotEvents (/var/www/chatbot-core/node_modules/hubot-botframework/src/adapter.coffee:66:10)
2017-09-12T16:41:04.257215076Z at ChatConnector.onEventHandler (/var/www/chatbot-core/node_modules/hubot-botframework/src/adapter.coffee:57:45)
2017-09-12T16:41:04.257221276Z at ChatConnector.onDispatchEvents (/var/www/chatbot-core/node_modules/botbuilder/lib/bots/ChatConnector.js:426:22)
2017-09-12T16:41:04.257276975Z at ChatConnector.dispatch (/var/www/chatbot-core/node_modules/botbuilder/lib/bots/ChatConnector.js:435:18)
2017-09-12T16:41:04.257286375Z at /var/www/chatbot-core/node_modules/botbuilder/lib/bots/ChatConnector.js:141:27
2017-09-12T16:41:04.257292575Z at OpenIdMetadata.getKey (/var/www/chatbot-core/node_modules/botbuilder/lib/bots/OpenIdMetadata.js:26:13)
2017-09-12T16:41:04.257298975Z at ChatConnector.verifyBotFramework (/var/www/chatbot-core/node_modules/botbuilder/lib/bots/ChatConnector.js:116:28)
2017-09-12T16:41:04.257305275Z at /var/www/chatbot-core/node_modules/botbuilder/lib/bots/ChatConnector.js:44:23
2017-09-12T16:41:04.257311775Z at callbacks (/var/www/chatbot-core/node_modules/hubot/node_modules/express/lib/router/index.js:164:37)
2017-09-12T16:41:04.257317975Z at param (/var/www/chatbot-core/node_modules/hubot/node_modules/express/lib/router/index.js:138:11)
2017-09-12T16:41:04.257324275Z at pass (/var/www/chatbot-core/node_modules/hubot/node_modules/express/lib/router/index.js:145:5)
2017-09-12T16:41:04.257330575Z at Router._dispatch (/var/www/chatbot-core/node_modules/hubot/node_modules/express/lib/router/index.js:173:5)
2017-09-12T16:41:04.257365774Z at Object.router (/var/www/chatbot-core/node_modules/hubot/node_modules/express/lib/router/index.js:33:10)
2017-09-12T16:41:04.257373174Z at next (/var/www/chatbot-core/node_modules/connect/lib/proto.js:174:15)
2017-09-12T16:41:04.257379174Z at Object.multipart [as handle] (/var/www/chatbot-core/node_modules/connect-multiparty/index.js:42:27)
2017-09-12T16:41:04.257385774Z at next (/var/www/chatbot-core/node_modules/connect/lib/proto.js:174:15)
2017-09-12T16:41:04.257394674Z at Object.urlencodedParser [as handle] (/var/www/chatbot-core/node_modules/body-parser/lib/types/urlencoded.js:81:44)
2017-09-12T16:41:04.257401074Z at next (/var/www/chatbot-core/node_modules/connect/lib/proto.js:174:15)
2017-09-12T16:41:04.257407074Z at /var/www/chatbot-core/node_modules/body-parser/lib/read.js:121:5
2017-09-12T16:41:04.257413274Z at invokeCallback (/var/www/chatbot-core/node_modules/raw-body/index.js:262:16)
2017-09-12T16:41:04.257447374Z at done (/var/www/chatbot-core/node_modules/raw-body/index.js:251:7)
2017-09-12T16:41:04.257456473Z at IncomingMessage.onEnd (/var/www/chatbot-core/node_modules/raw-body/index.js:307:7)
2017-09-12T16:41:04.257462573Z at emitNone (events.js:86:13)
2017-09-12T16:41:04.257468473Z at IncomingMessage.emit (events.js:185:7)
2017-09-12T16:41:04.257474273Z at endReadableNT (_stream_readable.js:974:12)
2017-09-12T16:41:04.257480173Z at _combinedTickCallback (internal/process/next_tick.js:80:11)
2017-09-12T16:41:04.257486073Z at process._tickCallback (internal/process/next_tick.js:104:9)
As the message payload format received from Skype for business is missing "sourceEvent", type error occurred to the middleware when reading property 'clientActivityId' in TextMiddleware.toReceivable function.
Attached the logs as below.