Today I get the error on my vCenter Server and I want to share that with you. That error was like as below:
Event 1209 ADWS
Active Directory Web Services encountered an error while reading the settings for the specified Active Directory Lightweight Directory Services instance. Active Directory Web Services will retry this operation periodically. In the mean time, this instance will be ignored.
When ADWS is unable to read the ports that AD LDS is configured to use for LDAP and Secure LDAP (SSL) services then this problem happens.
To Solve this issue VMware recommended this solution and I test that, It works:
1. Verify that the registry keys below exist and have exact values.
Key: HKLM\SYSTEM\CurrentControlSet\Services\<ADAM_INSTANCE_NAME>\Parameters
Value: Port LDAP
Type: REG_DWORD
Data: 389
Key: HKLM\SYSTEM\CurrentControlSet\Services\<ADAM_INSTANCE_NAME>\Parameters
Value: Port SSL
Type: REG_DWORD
Data: 636
If Port SSL value is REG_SZ, you must delete it and create a new REG_DWORD with the value 636 (decimal).
2. Make sure that the NT AUTHORITY\SYSTEM account has read permission to read both of that values.
3. Check ADWS service runs under the Local System account.
4. Make sure that the Domain Controller LDAP server signing value is disabled
HKLM\SYSTEM\CurrentControlSet\Services\NTDS\Parameters\LDAPServerIntegrity value set to 1.
After finishing all You need to restart ADWS service.
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GOOD LUCK!!!
