Frequently asked questions
Does Sigil work with Google Workspace?
Section titled “Does Sigil work with Google Workspace?”No. Sigil is built on Outlook add-ins and Microsoft Entra, so it requires Microsoft 365 with Exchange Online.
Does Sigil see the emails people send?
Section titled “Does Sigil see the emails people send?”No. Sigil writes into the compose window and does not sit in your mail flow. It has no access to message bodies, subjects or recipients. See data and privacy.
Can Sigil change anything in our directory?
Section titled “Can Sigil change anything in our directory?”No. It requests read-only Graph permissions and no write permission of any kind. See permissions.
Do users see their own signature as they write?
Section titled “Do users see their own signature as they write?”Yes. The signature is applied in the compose window, so the sender sees exactly what the recipient will get. This differs from server-side products that stamp signatures in transit, where the sender never sees their own.
Can people delete or edit the signature after it is applied?
Section titled “Can people delete or edit the signature after it is applied?”The signature is placed in the compose window, so a determined person can edit it in that message like any other content. What they cannot do is change what appears next time, because the template is served fresh on every compose.
Do users need to install anything?
Section titled “Do users need to install anything?”No. An administrator deploys the add-in centrally through Integrated apps. Individual installation does not work for automatic signatures, because event-based add-ins only auto-launch when an administrator deploys them.
How long does deployment take?
Section titled “How long does deployment take?”6 to 72 hours to propagate after you upload the manifest. Nothing speeds it up. See deploy the add-in.
How quickly does a template change reach people?
Section titled “How quickly does a template change reach people?”Seconds. Publishing increments the template version, which invalidates every cached signature for it. Nothing is redeployed and nobody restarts Outlook. See limits and timings.
Can we try a new signature on some people before everyone?
Section titled “Can we try a new signature on some people before everyone?”Yes. A staged publish goes to 10% of mailboxes and steps up to 25%, 50% and then everyone as the add-in reports that the new version is applying. The version everyone else receives does not change until it promotes, so abandoning it takes effect at once and republishes nothing. See staged rollouts.
What happens if a staged rollout goes wrong overnight?
Section titled “What happens if a staged rollout goes wrong overnight?”It withdraws itself. An evaluation runs every 15 minutes, and a version failing to apply materially more often than the one it would replace is pulled without anyone being asked. The mailboxes in the slice go back to the signature everyone else has been on throughout.
Can different departments have different signatures?
Section titled “Can different departments have different signatures?”Yes, using assignment rules that match on a directory attribute or Entra group membership.
Can we have a shorter signature on replies?
Section titled “Can we have a shorter signature on replies?”Yes. Assign a separate template to the reply role. The add-in detects replies and forwards and requests the reply signature. Without one, replies get the new-message template.
What happens with shared mailboxes?
Section titled “What happens with shared mailboxes?”They get their own signature, rendered when somebody switches the sending account. They are unlicensed, so they are free.
Can Sigil tell us if it is actually working?
Section titled “Can Sigil tell us if it is actually working?”Yes, and this is one of the things it does that most client-side signature tools cannot. Activity records every request and every apply outcome per mailbox, and lists mailboxes that have never had a signature applied.
Does link tracking identify individual recipients?
Section titled “Does link tracking identify individual recipients?”No. Click counts only. No IP address, no recipient identity, no cookie, no pixel. Links containing a per-person placeholder are never rewritten. See link clicks.
Why does the signature not appear the very first time someone uses it?
Section titled “Why does the signature not appear the very first time someone uses it?”The automatic path runs in a part of Outlook with no user interface, so it can only sign somebody in silently. On a first use, or after an expired session or an MFA prompt, that can fail and the add-in stops quietly rather than interrupting somebody mid-message. Opening the “My signature” pane once completes the sign-in, and it works automatically from then on.
Why is there no manual button on mobile?
Section titled “Why is there no manual button on mobile?”Outlook mobile activates add-ins in read mode only. Event-based activation is one of a small number of documented exceptions; a compose task pane is not. Signatures still apply automatically on mobile.
Can we use SVG logos?
Section titled “Can we use SVG logos?”No. Outlook does not render SVG. Use PNG or JPG. See Outlook constraints.
What happens if we stop paying?
Section titled “What happens if we stop paying?”Signatures stop being served. The add-in receives a 402 and applies nothing. Nothing is deleted, and restoring an active subscription restores signatures. See billing.
What happens at the end of the trial?
Section titled “What happens at the end of the trial?”Stripe converts it. With a card on file it charges the card. With no card on file it cancels the subscription, so an organisation that never adds a card stops rather than being billed unexpectedly.
Can we get our data out?
Section titled “Can we get our data out?”Templates export as portable JSON bundles including images. Everything held about a single mailbox can be exported for a subject access request. See import and export and compliance.
Can a managed service provider run this for us?
Section titled “Can a managed service provider run this for us?”Yes. See the partner programme.
Can we run Sigil alongside our existing signature product?
Section titled “Can we run Sigil alongside our existing signature product?”Not usefully. A server-side product that stamps signatures in mail flow will add its own on top of Sigil’s, producing two signatures per message. Switch a pilot group over rather than running both. See planning a rollout.