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ADFS and Web Application Proxy Error: The underlying connection was closed: An unexpected error occurred on a send.

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Thursday, October 20, 2016 8:24 PM

I have installed and configured a new ADFS server with a new * Wildcard Certificate, and now I am trying to get my WAP to connect to it but I keep getting this error:

An error occurred when attempting to establish a trust relationship with the federation service. Error: The underlying connection was closed: An unexpected error occurred on a send.

Can someone help me get this reverse proxy working so clients can connect to meetings from the internet.

Jeremy Robertson Network Admin

All replies (2)

Friday, October 21, 2016 6:49 AM âś…Answered

Hi hotrodjeremy,

Welcome to our forum.

When planning your ADFS infrastructure always keep in mind what you want your external users to use as the FQDN, check FQDN using the intended external FQDN as the Federation Server name, we could refer to the following link:

https://blogs.technet.microsoft.com/keithab/2015/04/13/error-while-configuring-wapthe-underlying-connection-was-closed/

If there are any questions or issues, please be free to let me know.

Best Regard,
Jim Xu
TechNet Community Support

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Friday, October 21, 2016 3:09 PM

hi 

If its related to ADFS you can also post the question in this forum

https://social.technet.microsoft.com/Forums/lync/en-US/home?forum=ADFS

Linus || Please mark posts as answers/helpful if it answers your question.