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Unexpected Error Refreshing Server Manager a Required Certificate is Not Within its Validity Period When Verifying Aganist the Current System Clock or the Timestamp in the Signed File

unexpected error refreshing server manager a required certificate is not within its validity period when verifying aganist the current system clock or the timestamp in the signed file

Unexpected Error Refreshing Server Manager a Required Certificate is Not Within its Validity Period When Verifying Aganist the Current System Clock or the Timestamp in the Signed File

HI recently i am working on Windows Server 2008 R2, when i open Server Manager. What i have seen is It gives me error and add roles & features links are disabled.

Error is: 

Unexpected Error Refreshing Server Manager a Required Certificate is Not Within its Validity Period When Verifying Aganist the Current System Clock or the Timestamp in the Signed File(Exception from HRESULT: 0x800B0101)

unexpected error refreshing server manager a required certificate is not within its validity period when verifying aganist the current system clock or the timestamp in the signed file

Solution:

Install following knowledge base http://support.microsoft.com/kb/2749655 and restart your server, it will sort out your issue.

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