Information about your computer's attempt to join a domain is logged in the Network Setup log, %SystemRoot%\Debug\NetSetup.LOG.

Here is an excerpt:

05/03 20:34:10 -----------------------------------------------------------------
05/03 20:34:10 NetpDoDomainJoin
05/03 20:34:10 NetpMachineValidToJoin: 'JSI009'
05/03 20:34:10 NetpGetLsaPrimaryDomain: status: 0x0
05/03 20:34:10 NetpMachineValidToJoin: status: 0x0
05/03 20:34:10 NetpJoinDomain
05/03 20:34:10  Machine: JSI009
05/03 20:34:10  Domain: JSIINC.COM
05/03 20:34:10  MachineAccountOU: (NULL)
05/03 20:34:10  Account: JSIINC.COM\Jerry
05/03 20:34:10  Options: 0x25
05/03 20:34:10  OS Version: 5.1
05/03 20:34:10  Build number: 2600
05/03 20:34:10  ServicePack: Service Pack 1
05/03 20:34:10 NetpValidateName: checking to see if 'JSIINC.COM' is valid as type 3 name
05/03 20:34:10 NetpCheckDomainNameIsValid \[ Exists \] for 'JSIINC.COM' returned 0x0
05/03 20:34:10 NetpValidateName: name 'JSIINC.COM' is valid for type 3
05/03 20:34:10 NetpDsGetDcName: trying to find DC in domain 'JSIINC.COM', flags: 0x1020
05/03 20:34:10 NetpDsGetDcName: found DC '\\jsi001.JSIINC.COM' in the specified domain
05/03 20:34:10 NetpJoinDomain: status of connecting to dc '\\jsi001.JSIINC.COM': 0x0
05/03 20:34:10 NetpGetLsaPrimaryDomain: status: 0x0
05/03 20:34:10 NetpGetDnsHostName: Read NV Hostname: JSI009
05/03 20:34:10 NetpGetDnsHostName: PrimaryDnsSuffix defaulted to DNS domain name: JSIINC.COM
05/03 20:34:10 NetpLsaOpenSecret: status: 0xc0000034
05/03 20:34:10 NetpGetLsaPrimaryDomain: status: 0x0
05/03 20:34:10 NetpLsaOpenSecret: status: 0xc0000034
05/03 20:34:11 NetpJoinDomain: status of setting machine password: 0x0
05/03 20:34:11 NetpGetComputerObjectDn: Cracking DNS domain name JSIINC.COM/ into Netbios on \\jsi001.JSIINC.COM
05/03 20:34:11 NetpGetComputerObjectDn: Crack results:  name = JSIINC05/03 20:34:11 NetpGetComputerObjectDn: Cracking account name JSIINC\JSI009$ on \\jsi001.JSIINC.COM
05/03 20:34:11 NetpGetComputerObjectDn: Crack results:  (Account already exists) DN = CN=JSI009,CN=Computers,DC=JSIINC,DC=COM
05/03 20:34:11 NetpModifyComputerObjectInDs: Initial attribute values:
05/03 20:34:11          DnsHostName  =  JSI009.JSIINC.COM
05/03 20:34:11          ServicePrincipalName  =  HOST/JSI009.JSIINC.COM  HOST/JSI009
05/03 20:34:11 NetpModifyComputerObjectInDs: Computer Object already exists in OU:
05/03 20:34:11          DnsHostName  =
05/03 20:34:11          ServicePrincipalName  =
05/03 20:34:11 NetpModifyComputerObjectInDs: Attribute values to set:
05/03 20:34:11          DnsHostName  =  JSI009.JSIINC.COM
05/03 20:34:11          ServicePrincipalName  =  HOST/JSI009.JSIINC.COM  HOST/JSI009
05/03 20:34:11 ldap_unbind status: 0x0
05/03 20:34:11 NetpJoinDomain: status of setting DnsHostName and SPN: 0x0
05/03 20:34:11 NetpGetLsaPrimaryDomain: status: 0x0
05/03 20:34:11 NetpSetLsaPrimaryDomain: for 'JSIINC' status: 0x0
05/03 20:34:11 NetpJoinDomain: status of setting LSA pri. domain: 0x0
05/03 20:34:11 NetpJoinDomain: status of managing local groups: 0x0
05/03 20:34:11 NetpJoinDomain: status of setting netlogon cache: 0x0
05/03 20:34:12 NetpJoinDomain: status of setting ComputerNamePhysicalDnsDomain to 'JSIINC.COM': 0x0
05/03 20:34:12 NetpUpdateW32timeConfig: 0x0
05/03 20:34:12 NetpJoinDomain: status of disconnecting from '\\jsi001.JSIINC.COM': 0x0
05/03 20:34:12 NetpDoDomainJoin: status: 0x0