Uninstall Exchange An Active Directory error 0x. Error. I was in the middle of doing a SBS Migration from 2. After the new hardware had installed SBS it said Exchange cannon be installed. XADMExch2010 Exchange EMC cannot access the AD configuration data. An Active Directory error 0x51 occurred when. Drivers Hours Of Service Spreadsheet. I went to addremove programs and install it manualy but it gave me an error about LDAP. I whent ahead and continued not paying attention and the installation of Exchange was successful but was telling me it had no license key and had 1. Well there is no license key that I know of as its part of SBS so I tried the SBS key with no success. So I tired to uninstall exchange but I got the following errors Summary 3 items. An Active Directory error 0x51 occurred. Error Active. enspenspAn Active Directory error 0x51 occurred when trying to check. Pc98 Game. MoveMailbox TargetDatabase Target ServerFirst Storage Group. When you run setup to upgrade Exchange server 2013. An Active Directory error 0x51 occurred when trying to check the suitability of server DC1. Active Directory Error 0x51 occurred when trying to check the suitability of server servername. Manual De La Iglesia Adventista Del Septimo Dia Actualizado'>Manual De La Iglesia Adventista Del Septimo Dia Actualizado. Error Active directory response The LDAP server is unavailable. An Active Directory Error 0X51 Occurred When Trying To Check The Suitability Of Server Exchange' title='An Active Directory Error 0X51 Occurred When Trying To Check The Suitability Of Server Exchange' />Elapsed time 0. Mailbox Role Prerequisites Failed Error Setup encountered a problem while validating the state of Active Directory An Active Directory error 0x. SBSRAQ. enplan. local 3. The LDAP server is unavailable. Elapsed Time 0. 0 0. Client Access Role Prerequisites Failed Error Setup encountered a problem while validating the state of Active Directory An Active Directory error 0x. SBSRAQ. enplan. local 3. The LDAP server is unavailable. Elapsed Time 0. 0 0. Hub Transport Role Prerequisites Failed Error Setup encountered a problem while validating the state of Active Directory An Active Directory error 0x. SBSRAQ. enplan. local 3. The LDAP server is unavailable. Elapsed Time 0. 0 0. So now I want to uninstall exchange on the desination server and start the migration over again but i get this error so it wont let me continue.