Last post Mar 10, 2014 04:26 AM by George Qiao
Mar 08, 2014 02:27 PM|malte99|LINK
We have a farm using Windows Server 2008 R2 and now we want to move up to windows server 2012 R2.
Everything works fine with cookies , but we get invalid viewstate.
(yes we use explicit machinkey in web.config)
If we use just windows server 2012 r2 servers the viewstate is just fine when going from different hosts in the web farm.
Does anybody now what to do?
Is there a registry hack or specifying serialization enginge?
Mar 10, 2014 04:26 AM|George Qiao|LINK
Thanks for your post.
What’s the detailed error or issue you occurred?
This issue happened in your Windows Server 2008 R2(IIS 7.5) farm? But if you’re using Windows Server 2012 R2(IIS 8.5), everything will works fine?
Please follow the steps in this KB to troubleshooting the view state is invalid issue: