Error: "The CSR is incomplete or invalid. Submit a valid CSR." using renewal certificate signing request (CSR) file from Microsoft IIS

Solution ID:    SO6976    Updated:    05/28/2008


This error occurs when generating the Certificate Signing Request (CSR), the Certificate Renewal Wizard concatenates the Organizational Units into one field. Typically, the resulting renewal CSR will contain an entry in the Organizational Unit field that exceeds the maximum character limit. Therefore, the CSR is rendered invalid. Microsoft has confirmed that this is a problem in Microsoft IIS 5.0.


For Microsoft IIS 5.0 users, this issue was resolved with service pack 4.  For more information, refer to Microsoft solution 325827
If the problem persists, refer to SO1552  

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