Cannot time stamp Excel VBA XLAM Addin signed using SHA256 certificate in Office 2016 RRS feed

  • Question

  • If I sign an Excel VBA XLAM add-in with an SHA-256 certificate, then my attempts to add a time-stamp all quietly fail, and result in signed code that has no time-stamp. I follow the usual instructions for adding registry entries (eg, and have tried all 3 time-stamping URL's listed (SHA-1, SHA-1 with RFC 3161 and SHA-256 with RFC 3161), and they all fail to add a time-stamp to my SHA-256 signed add-in. This has worked fine for me before using SHA-1 certificates.

    I am using Office 2016: Excel 2016 MSO (16.0.4738.1000) 32 bit.

    I note that Solver.xlam in Office 2016 is signed using a SHA-1 certificate, which suggests SHA-256 is not supported yet for XLAM files.

    Does Excel 2016 support signing and time-stamping of VBA add-ins using SHA-256 certificates?

    Wednesday, November 21, 2018 2:36 AM

All replies

  • Hi,

    This is the forum to discuss questions and feedback for Microsoft Excel features, I'll move your question to the MSDN forum for Excel

    The reason why we recommend posting appropriately is you will get the most qualified pool of respondents, and other partners who read the forums regularly can either share their knowledge or learn from your interaction with us. Thank you for your understanding.



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    Thursday, November 22, 2018 6:17 AM