Citrix Web Interface - Delay on first page

Whenever you restart IIS on WI or WI server, the first page takes one minute to get the Welcome page for first user. All other connections are normal until you restart IIS again.

Work Around:

This issue is caused by a CRL check sent to Verisign. If the Web Interface server cannot access the internet, the CRL check fails and times out.

Check in IIS for the ASP.net version that is in use with the Web Interface site.
Modify Aspnet.config  in the following directory
C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727 (If Web Interface uses .Net framework v2.0.50727)



Add the following lines to your ASPNET.CONFIG or APP.CONFIG         

      <*?xml version="1.0" encoding="utf-8"?*>
  <*configuration*>
   <*runtime*>
      <*generatePublisherEvidence enabled="false"/*>
     <*/runtime*>
 <*/configuration*>

Note:  Remove * stars before and after in each line.
The ASPNET.CONFIG file location would be:
c:\Windows\Microsoft.NET\Framework64\v2.0.50727
For a 32-bit application it would be:
c:\Windows\Microsoft.NET\Framework\v2.0.50727

More information Check this article: CTX117273.

Have a nice day!