How can I invite multiple stakeholders to comment on multiple diagrams in one invitation without using the “Invite anyone for feedback” feature as anyone having the link at hand could use it, and even worse also commenting in the name of the person who received the link.
Using the Invite anyone for feedback is the only available way.
The link(s) sent in the e-mail should not be shared if it is to remain exclusive to the recipient. In fact the email body contains the text:
To view the diagrams, click on one of the links below. The links are personalized and created just for you. Please do not forward the links to anyone else.
KBA , BPI-SIG-CA-SEC-UM-IN , Invitations / License Management for SAP Signavio , How To