Signatures cache in CodeTwo Outlook Add-in

This article applies to Outlook (client-side) signatures only.

CodeTwo Signatures Add-in for Outlook caches Outlook signatures to insert them quicker into emails. Read on to learn how the caching mechanism works.

How CodeTwo Add-in cache works

CodeTwo Outlook signatures can be cached locally. When you compose an email, the CodeTwo add-in first checks the cache for a signature that matches the current conditions of your message (e.g. sender, recipients and message type). If it finds a matching signature in the cache, it inserts that one. If not, the add-in fetches the appropriate signature from the CodeTwo cloud instead of cache.

The add-in cache is refreshed every 15 minutes. If a signature has been stored in the cache for over 15 minutes, the next time you compose an email, the add-in will check for changes in your organization's Outlook (client-side) signature rules. If changes are found, the add-in will automatically update the signature in your email as well as in the cache.

Thanks to this mechanism, signatures are inserted quickly and stay up to date.

Important

Signatures shown in the add-in pane (see Fig. 1.) are fetched from the CodeTwo cloud, not from the cache. This means every time you open the pane, the add-in retrieves the current signature list based on the rules configured in the CodeTwo Signatures app.

When Outlook works in offline mode, web add-ins like ours are not active so the signature will not be inserted. If you create an email draft in the offline mode and open it when you're back online, the add-in should add your signature to the message - this works in Outlook for Windows (classic & new) & OWA. In other Outlook versions, you can insert the signature manually from the add-in pane.

How to update Outlook signatures right after you change Outlook (client-side) signature rules

If you're a signature rule admin and you're setting up or changing CodeTwo Outlook signature rules, it may take up to 15 minutes for end users to see these changes in Outlook signatures. The same goes for updates in the My user info app (user.codetwo.com). That's because (as explained earlier) the CodeTwo Outlook Add-in checks for signature updates every 15 minutes. Outlook users can refresh their add-in cache faster by manually inserting any signature from the pane:

Open the add-in pane in Outlook desktop or web (OWA).
Check if the signature you created/updated is listed.
Add it manually from the pane (Fig. 1.).

Once you add the signature, the add-in cache is refreshed and up to date.

Fig. 1. Adding a signature manually from the CodeTwo add-in's pane.