SummaryRequest Manager is functionality in SharePoint Server 2013 that enables administrators to manage incoming requests and determine how SharePoint Server 2013 routes these requests.
SolutionHaving the Request Manager active can cause 'invalid server' or 'server not licensed' errors.
Request Manager uses configured rules to perform the following tasks when it encounters requests:
- Deny potentially harmful requests from entering a SharePoint farm.
- Route good requests to an available server.
- Manually optimize performance.
Information that administrators or an automated process provide to Request Manager determine the effectiveness of routed requests.
If you are using the "Request Manager service", please be aware that it effectively operates as a load balancer and if you intend to use it, it needs to be correctly configured to only include the web front end servers. For more information, please refer here: http://technet.microsoft.com/en-us/l.../jj712708.aspx