Error Code: 0xC3EC7A19 when add server to pool at OCS 2007's Enterprise Edition

I got following error message when add server to pool at OCS 2007 R2

Error Code:

Unable to access pool information. Possible reasons include inability to authenticate to the domain, WMI service Issues, lack of network connectivity and other system issues. (Error Code: 0xC3EC7A19)

Solution:

My Server which will be installed OCS R2 could not reach to DC through network, checked all network components (repair network adapters) and problem solved.

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