After the (failed) sync, Outlook checks to see if the signatures that we have on the PC match the list of signatures in the roaming_signature_list. Because the new signature does not appear in the list shortly after a sync up, Outlook deletes it.

Tell me more about digital signatures and certificates. Show me how to get a digital signature from a certificate How would I learn about signing certificates? More and more people and organizations are using digital documents instead of paper documents to conduct day-to-day transactions.

How to create or edit your Outlook signature for email messages. Include your signature, text, images, electronic business card, and logo.

Learn how to create a signature for your email messages insert them into messages, either manually or automatically.