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AndrewFrance-5844 avatar image
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AndrewFrance-5844 asked JimmyYang-MSFT commented

SfB Hybrid Signin Error

Hi,
We're getting the following error when trying to sign in with our O365 admin account into the SfB Control Panel:

Get-CSWebTicket : The underlying connection was closed: An unexpected error occurred on a send

The server is SfB 2015 Standard CU 11 on Server 2016

Kind Regards,
Andrew

office-skype-business-server-administration
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1 Answer

JimmyYang-MSFT avatar image
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JimmyYang-MSFT answered JimmyYang-MSFT commented

Hi @AndrewFrance-5844

This issue seems related to the TLS connection. In this way, we recommend you try to run the following command in PowerShell to enforce TLS 1.2.

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

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@AndrewFrance-5844

Just checking in to see if above information was helpful. If you have any further updates on this issue, please feel free to post back.

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This just saved my butt. I've been running Skype on-prem to Online migrations every Friday night for weeks, then all of the sudden, my script fails tonight. The code snippet you provided worked perfectly for me. Thanks for the assist!

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@BJZale-6975

Glad to see the above information is helpful to you!

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