c# - Email Confirmation Error Invalid Token AspNet Identity -

i have 2 web applications, wcf , mvc share same database. using aspnet identity 2.0

while registering new user, creates confirmation token , sends email user. creating token, sending email done in wcf, verification done in mvc application.

var code = usermanager.generateemailconfirmationtoken(user.id); string.format("{0}/account/confirmemail?userid={1}&code={2}", websiteurl,     httputility.urlencode(user.id), httputility.urlencode(codeid)); 

i using same data protection provider

in wcf

var provider = new microsoft.owin.security.dataprotection.dpapidataprotectionprovider("mytestapplication"); usermanager.usertokenprovider =                 new microsoft.aspnet.identity.owin.dataprotectortokenprovider<applicationuser>(                     provider.create("usertoken"))                 {                     tokenlifespan = timespan.fromdays(7)                 }; 

in mvc

var dataprotectionprovider = new microsoft.owin.security.dataprotection.dpapidataprotectionprovider("mytestapplication"); manager.usertokenprovider = new dataprotectortokenprovider<applicationuser>(dataprotectionprovider.create("usertoken"))                 {                     tokenlifespan = timespan.fromdays(7)                 };             } 

source : make asp.net identity 2.0 email confirm token work wcf , mvc

now problem

1. works fine in localhost , qa. tested ok on ssl in localhost too.

2. fails on production (uses ssl). generating token wcf , validating in mvc fails.

3. generating , validating in same application works.

how invalid token error occuring? has web.config it?

found problem.

it application pools in iis. using different application pool wcf , mvc application. put in same application pool , working fine.

additional info: having same problem , solution doesn't fix problem might want try machinekey.

http://gunaatita.com/blog/invalid-token-error-on-email-confirmation-in-aspnet-identity/1056

ps. find answer myself after post on stackoverflow. thank you.