HI, i am trying to set up replication beacouse security reasons if one of my dc-s fail. i have one domain server 2008R2 mydomain.local with exchange server 2010, and 3 subdomains subdoimain1.mydomain.local subdoimain2.mydomain.local subdoimain3.mydomain.local, this domains are in other citys than my first domain, and in case subdomain1 fails my users from subdomain1 are unable to connect to exchang server, do you have any advice about this. Thx

Hello, as I see this is a problem with exchange. Better if you ask in Exchange forums: http://social.technet.microsoft.com/Forums/en-US/category/exchangeserver What do you mean by subdomain1 fails? This posting is provided "AS IS" with no warranties or guarantees , and confers no rights. Microsoft Student Partner 2010 / 2011 Microsoft Certified Professional Microsoft Certified Systems Administrator: Security Microsoft Certified Systems Engineer: Security Microsoft Certified Technology Specialist: Windows Server 2008 Active Directory, Configuration Microsoft Certified Technology Specialist: Windows Server 2008 Network Infrastructure, Configuration Microsoft Certified Technology Specialist: Windows Server 2008 Applications Infrastructure, Configuration Microsoft Certified Technology Specialist: Windows 7, Configuring Microsoft Certified IT Professional: Enterprise Administrator

lets say my firewall on subdomain1 fails and my vpn is not working with subdomain1, then exchange checks credentials from user in subdomain1 but cant reach domain so user cannot login.