TLS changes causing MS teams to fail

[TobyHawkes]

Our MS teams poshbot stopped responding to messages recently

Current Behavior

An error is logged in poshbot.log "Error authenticating to Teams" which is caused by Invoke-RestMethod
"The underlying connection was closed: An unexpected error occurred on a send."
The command it is running is: $members = Invoke-restmethod -uri $uri -headers $headers
which is on line 7939 (in version 0.11.3)

Possible Solution

MS have updated their requirements for TLS as noted here: https://blog.botframework.com/2018/11/06/announcement-azure-bot-service-enforcing-transport-layer-security-tls-1-2/
To enforce tls version 1.2 when the module is running invoke-restmethod I added "[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12" at the top of poshbot.psm1

Your Environment

• Module version used: 0.11.3
• Operating System and PowerShell version: server 2016, powershell 5.1.14393.2608

[devblackops]

Thanks for reporting this @TobyHawkes! Easy fix to ensure we're using TLS 1.2 with the code you provided.

[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12

[TobyHawkes]

Great, thanks for the quick response