The Secure Store Service application Secure Store Service Proxy is not accessible

Question

I am working on setting up a new SharePoint 2013 Farm for our external web site which is currently running on 2010 SharePoint. Because this is an External Website for our organization we have an internally available Publishing Site and there is an Web App
Extension to provide Anon Access to users using the www address. Currently I am doing everything on a single server for testing with HOSTS entries to loop back so I can test with real host headers and not impact the 2010 prod environment. We will be setting
up 2 more WFEs with a NLB before moving this into prod but it isn't there yet. We brought the Site Collection Databases over but are still running in 2010 mode for now.
I migrated a copy of the Secure Store Database over from 2010 and had it put on the 2013 Farm's Database Server. Set up Secure Store and the Secure Store Proxy. I went into the Secure Store Proxy in CA and refreshed the Key with the proper Pass Phrase. After
doing that I could see the Target Application IDs listed. Everything was looking good so I went off to test. If I am on the publishing site I can go to a page that has the solution on it and it operates as expected. It does a query to a non SharePoint database
and returns information filtered based on the search parameters. The only odd thing I see is if I click on the "Site Actions" I get a message "An error has occurred with the data fetch. Please refresh page and retry." Need to look into
that more but it only happens on pages that have these solutions. Maybe a clue. If I go to the Anonymous Access page (www......) and try and use the solution, it immediately (way too quick to appear like it is doing anything) comes back with "The security
token request cannot be completed."
If I dig through the usage logs I am finding the following.
The Secure Store Service application Secure Store Service Proxy is not accessible. The full exception text is: The security token request cannot be completed.
Unexpected exception from endpoint address : https://[Servername]:32844/4e87fd3aabb640fb8cc3ed52188cf5c0/SecureStoreService.svc/https
Logging unknown/unexpected client side exception: InvalidOperationException. This will cause this application server to be removed from the load balancer queue. Exception: System.InvalidOperationException: The security token request cannot be completed.
    at Microsoft.SharePoint.SPSecurityContext.SecurityTokenForServiceContext(Uri contextUri)     at Microsoft.SharePoint.SPChannelFactoryOperations.InternalCreateChannelActingAsLoggedOnUser[TChannel](ChannelFactory`1 factory, EndpointAddress
address, Uri via)     at Microsoft.Office.SecureStoreService.Server.SecureStoreServiceApplicationProxy.GetChannel(Uri address)     at Microsoft.Office.SecureStoreService.Server.SecureStoreServiceApplicationProxy.Execute[T](String operationName,
Boolean validateCanary, ExecuteDelegate`1 operation).
Initially I was fighting a firewall issue because it wasn't working (different errors) on both sides. Had Network Engineers open firewall ports needed and now it works on the publishing side. Still the same error on the Anon side. I suspect I have missed
something when it comes to configuring the Secure Store to allow access to anonymous connections.
Let me know if you need any more information but that should paint a pretty good picture as to how things are set up.
Thanks for any help on this one. Searches haven't found much that has helped so far.

Answer 1

Hi Sennister,
I recommend to verify the things below:
Did this issue occur with all the pages in the anonymous side?
Check if the Claims to Windows Token Service is started.
Change the <identity impersonate="true" /> in the web.config to see if the issue still occurs.
Thanks,
Victoria
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Victoria Xia
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