Hello, I have 3 Exchange 2010 servers. EXC2010 -> Mailbox, CAS, Hub transport (First server) MAILBOX -> CAS, Mailbox (Second server) EXCAS -> CAS, Mailbox (Third server) I want to use 2 CAS server and load balance the traffic between EXCAS and MAILBOX. After load-balancing, I'll remove CAS and MAILBOX roles from EXC2010 server. I can create certificate and assign it to EXCAS and EXC2010 without problem but I can't add a certificate to MAILBOX server. I also exported the certificate from EXC2010 and imported to EXCAS without no problem, but I also tried to import it to MAILBOX, I always receive this error. I mean, I use same SSL certificate in server EXCAS and server EXC2010 but I can't use any certificate with same Common name in server MAILBOX. What is the problem of server MAILBOX? How can I resolve it? Screenshots: http://www.yusufozturk.info/images/EXCAS.png http://www.yusufozturk.info/images/EXC2010.png http://www.yusufozturk.info/images/MAILBOX.png http://www.yusufozturk.info/images/MAILBOX2.png Thanks for help. MSP - Microsoft Student Partner (2009-2010) http://www.yusufozturk.info

Update: I figured out, server "MAILBOX" doesn't recognize RootCAType. Please check here: http://www.yusufozturk.info/images/rootcatype.png How can I resolve it? Thanks.MSP - Microsoft Student Partner (2009-2010) http://www.yusufozturk.info

I solved it. Using MMC, I exported "Alpha CA" certificate, and imported it to Intermediate Certificataion Auth. and Trusted Root Certificataion Auth then I refresh Exchange Server 2010 console, now it looks OK. I hope this helps anothers who have same problems.MSP - Microsoft Student Partner (2009-2010) http://www.yusufozturk.info

Thank you for sharing with us. :)

Hi there, I'm having a similar issue, I'm using a win 2008 Enterprise CA installed in the root domain to issue SAN certificate for Exchange 2010 for test. I'm getting this error: The certificate is invalid for Exchange Server usage I've already imported my CA to Trusted Root Certification Auth & Intermediate Certification Auth in my Exchange server. Thks.

Thank you, that solved the problem I was having.