Hello,
As this issue happened after upgrading update 4 on TFS, it seems like that this update has changed something in TFS server. The management pack is sealed with the designed script to test the URL, to work around this issue, you can disable the default one,
and re-write a new one to monitor for administration web service.
In addition, you may feedback this issue in the link below:
https://connect.microsoft.com/
Regards,
Yan Li
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