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  2. Obtain a digital certificate and create a digital signature

    support.microsoft.com/en-us/office/obtain-a-digital-certificate-and-create-a...

    To digitally sign an Office document, you must have a current (not expired) digital certificate. Digital certificates are typically issued by a certificate authority (CA), which is a trusted third-party entity that issues digital certificates for use by other parties.

  3. Digital signatures and certificates - Microsoft Support

    support.microsoft.com/en-us/office/digital-signatures-and-certificates-8186cd...

    Certificates are issued by a certification authority, and like a driver’s license, can be revoked. A certificate is usually valid for a year, after which, the signer must renew, or get a new, signing certificate to establish identity.

  4. View digital signature and certificate details - Microsoft...

    support.microsoft.com/en-us/office/view-digital-signature-and-certificate...

    You can view information about a digital signature, or the certificate that is used to create the digital signature, in Word, PowerPoint, and Excel. For more information on adding or removing digital signatures, see Add or remove a digital signature.

  5. Digitally sign your VBA macro project - Microsoft Support

    support.microsoft.com/en-us/office/digitally-sign-your-vba-macro-project-956e9...

    This article describes how you can digitally sign a macro project on Windows by using a certificate. If you don't already have a digital certificate, you'll need to get one. Tip: To use or test macro projects on your own computer, you can create your own self-signing certificate by using the Selfcert.exe tool.

  6. Obtain a digital certificate and create a digital signature

    support.microsoft.com/en-gb/office/obtain-a-digital-certificate-and-create-a...

    To digitally sign an Office document, you must have a current (not expired) digital certificate. Digital certificates are typically issued by a certificate authority (CA), which is a trusted third-party entity that issues digital certificates for use by other parties.

  7. Add or remove a digital signature for Microsoft 365 files

    support.microsoft.com/en-us/office/add-or-remove-a-digital-signature-for...

    Certificates are issued by a certification authority, and like a driver’s license, can be revoked. A certificate is usually valid for a year, after which, the signer must renew, or get a new, a signing certificate to establish identity.

  8. Digital signatures and certificates - Microsoft Support

    support.microsoft.com/en-au/office/digital-signatures-and-certificates-8186cd...

    Signing certificate To create a digital signature, you need a signing certificate, which proves identity. When you send a digitally-signed macro or document, you also send your certificate and public key. Certificates are issued by a certification authority, and like a driver’s license, can be revoked.

  9. Add, remove, or view a trusted publisher - Microsoft Support

    support.microsoft.com/en-us/office/add-remove-or-view-a-trusted-publisher-87b3...

    Before you decide that a publisher is reliable, you should know the identity of the publisher, and whether the publisher's credentials are valid. Office will notify you if the file you're opening has been signed with an invalid or expired certificate.

  10. View, manage, and install add-ins for Excel, PowerPoint, and Word...

    support.microsoft.com/en-us/office/view-manage-and-install-add-ins-for-excel...

    While working with add-ins, you may need to learn more about digital signatures and certificates, which authenticate an add-in, and trusted publishers, the software developers who often create add-ins.

  11. Trusted documents - Microsoft Support

    support.microsoft.com/en-us/office/trusted-documents-cf872bd8-47ec-4c02-baa5-1...

    Trusted documents are files that have been marked as trusted by enabling active content in them. Active content (macros, ActiveX controls, data connections, and so on) opens without the Message Bar warning after you mark the file as trusted.

  12. Add a signature line - Microsoft Support

    support.microsoft.com/en-us/office/add-a-signature-line-f7e20a6c-eeed-4e01-ac...

    You can add a signature line to a document, add a graphic of your handwritten signature, or save a signature block as an AutoText building block. For information on adding a digital signature, see Add or remove a digital signature in Office files. Need more help? Want more options?