As TMG RTM is very close, the amount of downloads for TMG Beta 3 is growing and with that, some users are facing some issues while trying to install TMG Beta 3. This one in particular refers to an error trying to check domain membership while installing ADLS and if you open the file %windir%\temp\ ISAADAM_INSTALL_XXX.log you might see the following error:

 

adamsetup 7E4.BEC 0163 10:05:53.536             Enter CheckServiceSecurity

adamsetup 7E4.BEC 0164 10:05:53.536             Enter InitSecWinntAuthIdentity

adamsetup 7E4.BEC 0165 10:05:53.536             Enter State::GetOperation UNIQUE

adamsetup 7E4.BEC 0166 10:05:53.957             Enter State::GetOperation UNIQUE

adamsetup 7E4.BEC 0167 10:05:53.957             NtdsAdamValidateServiceAccount() => 1789

adamsetup 7E4.BEC 0168 10:05:53.957             info.eValidationResult = 0

adamsetup 7E4.BEC 0169 10:05:53.957             Enter GetErrorMessage 800706FD

adamsetup 7E4.BEC 016A 10:05:53.957             ADAMERR_OK

adamsetup 7E4.BEC 016B 10:05:53.957           AD LDS Setup was unable to validate the selected service account.

Error code: 0x800706fd

The trust relationship between this workstation and the primary domain failed.

adamsetup 7E4.BEC 016C 10:05:53.957           ADAMERR_OK

adamsetup 7E4.BEC 016D 10:05:53.957         Enter Feedback::ShowMessage AD LDS Setup was unable to validate the selected service account.

Error code: 0x800706fd

The trust relationship between this workstation and the primary domain failed.

 

Also, keep in mind that if you are trying to install TMG Beta 3 on Windows Server 2008 R2 it might not install or it might install and do not work properly, the reason why is because TMG Beta 3 was not projected to run on Windows Server 2008 R2 therefore is not supported (for this release – Beta 3). Don’t worry, by TMG RTM version we will be fine with that, however if you want to play with TMG Beta 3 now make sure to install Windows Server 2008 version (no R2).If you are indeed using Windows Server 2008 (only) and you are receive this error on the log, than go ahead and start troubleshooting domain membership problems, secure channel, RPC, etc…you know the drill J.

 

If you need to discuss technical issues about TMG Beta 3, Microsoft has an open forum for that on the link below:

http://social.technet.microsoft.com/Forums/en-US/FTMGNext/threads