Hi, The certificate in Exchange is used for Web-based service and SMTP connection. Based on the information provided, it should contain all names in two sites, including: Your email address suffix; The external URLs; The internal URLs; Server names; Reference: Planning for Your Organization's Namespace (the same in Ex2010 that all possible names should be included in SAN cert) http://technet.microsoft.com/en-us/library/bb851505(EXCHG.80).aspx Certificate Use in Exchange 2007 Server http://technet.microsoft.com/en-us/library/bb851505.aspx More on Exchange 2007 and certificates - with real world scenario http://blogs.technet.com/b/exchange/archive/2007/07/02/3403301.aspx Fiona Liao TechNet Community Support

Hi, The certificate in Exchange is used for Web-based service and SMTP connection. Based on the information provided, it should contain all names in two sites, including: Your email address suffix; The external URLs; The internal URLs; Server names; Reference: Planning for Your Organization's Namespace (the same in Ex2010 that all possible names should be included in SAN cert) http://technet.microsoft.com/en-us/library/bb851505(EXCHG.80).aspx Certificate Use in Exchange 2007 Server http://technet.microsoft.com/en-us/library/bb851505.aspx More on Exchange 2007 and certificates - with real world scenario http://blogs.technet.com/b/exchange/archive/2007/07/02/3403301.aspx Fiona Liao TechNet Community Support

I am going to implement active/active DAG for my organization between 2 geographic locations for site resiliency. Data center 1- 2 mailbox servers with 4 database each, and configured with DAG for high availability. 2 HT servers 2 CAS servers with array configured Data Center 2 2 Mailbox servers with 4 database each and configured with DAG for high availability 2 HT servers 2 CAS servers with array configured For site resiliency I have planned to have a stretched DAG (DAG across 2 geographic locations), Please let me know how should I plan for certificates in each location. Note- Each location has separate internet connections.

Hi, Any updates? If your question is answered it would be nice if you mark it accordingly. Thanks,Fiona Liao TechNet Community Support