After you have finalized an Add-In for Excel workbook, you can verify the workbook by signing it with a digital signature. A digital signature is an encrypted verification that confirms that the workbook originated from the signer and has not been altered since it was signed.

You cannot edit a signed workbook without first breaking the signature.

Note

Before signing a workbook you need to create or obtain a digital ID. For more information about digital IDs, see the Microsoft Excel documentation.

  1. Click the ACL Add-In tab.
  2. Select Sign Workbook and in the Purpose for signing this document text box, enter the purpose.
  3. Verify that the Signing as identity is correct and click Sign.
  1. Click the ACL Add-In tab and if the Signature pane is not displayed in the worksheet, click File > Info > View Signatures.
  2. In the Signature pane, click the drop-down arrow next to the signature you want to remove.
  3. Click Remove Signature.
  4. Click Yes in the confirmation dialog box.