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TMG constant authentication pop up


I am having a problem on one of my sites with TMG 2010. It is working as the proxy server. The users that are connecting through it are constantly getting authentication pop-ups when working on the internet. They then enter the correct details and it either goes away or comes straight up again. The AD user accounts aren’t getting locked out so the details they are using are correct. It just happens randomly and to all the users. I checked if there was a time difference between the TMG server, the client box as well as the DC and that’s all fine… They are not experiencing any other authentication issues at all – just this one on the proxy server…
2 Solutions
Carol ChisholmCommented:
Use the test rule button in the rules. Pretty sure to be a difference in the authentication method (basic/NTLM and so on. TMG has a good diagnostic tool.
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