Hi Ang, It will vary, depending on the type of cert. But yes, each user can have their own certs. They are typically stored in the users profile here: "%AppData%\Microsoft\SystemCertificates\My\Certificates\" If they are stored as a file, and all certs are the same, all you need to do is copy them into place on login. Cheers, Jeremy. From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of Angela Smith Sent: Monday, 22 August 2011 4:13 PM To: thin@xxxxxxxxxxxxx Subject: [THIN] Multiple Digital Certs on Citirx Hi I have an application that requires digital certificate. Each user has a certificate. Can a Windows 2003 XenApp 4.5 Server have multiple certs for the one app??? Ive never worked with certs before. Are the certs User based? How would a user select their cert? Would users have access to install the cert or would I need to do it on their behalf? Is there any best practices in relation to installing certs? Thanks Ang