I've made a team site using several Excel Web Access web parts, and a little custom CSS.
However, after opening two sub sites, and going for the third, the Excel Web Access web part isn't rendering, and an error message appears: I get the HTTP Error 400: The size of the request headers is too long.

I found that this is a common issue, mentioned here:


What I am interested here is that if it is related to user being in many Active Directory groups, why it started occurring for all users at a time. If this is the case it shouldn't be appearing for new user in the organization(though I have not tested it yet).What is the limit of groups by which a user can be associated with and also if any experts can provide me links/guide as how this Request header is getting created?

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