If you are experiencing client certificate issues, check the following items:

• If there is a Tumbleweed client on the server, make sure it is running.
• Windows: Check if there are too many certificates in the user’s store. There is a limit to the number of certificates that can be tried before a timeout. The number is about 150 certificates.
• Windows: An intermediate certificate issued by the organization prevents the desktop client from connecting. Remove the intermediate certificate to resolve the problem.
• If your desktop client does not authenticate, it may be due to nonstandard formatting in your CAC certificate. Contact BlackBerry AtHoc customer support and request that an organization-specific regular expression be configured for your system.