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Your code behind is running as the current user. Since anonymous users do not have permission to add items to your list you get access denied. The solution to this is generally to use SPSecurity.RunWithElevatedPrivileges, this will run the small block of code as the web app account which will generally have the correct permissions to add items to a list. ...


This simply isn't supported. SharePoint needs to be able to make those calls as well, e.g. PowerPivot (call is translated from NT AUTHORITY\ANONYMOUS to the target caller). You will just need to communicate this to your security folks.


did you tried adding authorization rule in web.config file. eg. for specific sitecollection <location path="sub-site/_vti_bin"> <system.web> <authorization> <deny users= "?" /> <allow users = ”*” /> </authorization> </system.web> </location> refer below link for further details : ...

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