For does of you using SquaredUp in your SCOM environment,
I’ve encountered a problem with some of the users while using windows authentication (SSO):
When trying to open any SquaredUp page/Dashboard the user is getting a HTTP 400 – Bad Request (Request Header too long) error.
The root couse for this behavior is that the specific user/users are members in large amount of AD groups.
I’ve found the solution on a Microsoft KB:
DO THIS ON YOUR OWN RISK!
In order to fix the problem, you need to add two DWARD registry keys on you server hosting the SquaredUp IIS application:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\HTTP\Parameters\MaxFieldLength = 65534
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\HTTP\Parameters\MaxRequestBytes = 16777216
After doing so, you will need to restart the server.