Not able to complete Vault eSignatures in an iFrame using Single Sign-On credentials.
Okta (a common Single Sign-On provider) no longer supports eSignatures using iFrame.
In the Vault Single Sign-On settings, enable the Authenticate SAML eSignatures in a pop-up window rather than in an iFrame setting. See the attached screenshot and related documentation for more details on how to do this in Vault.
Vault Documentation: About eSignature Authentication Context
Send us your feedback: We're always looking for advice to help improve our Knowledge Base! Please let us know if this article was helpful or provide feedback on how we can improve your experience here.