Delivery and tracking logs are only stored for 6 months by default. If you want to extend the length these are retained, you'd need to speak to your CSM & TechOps to try and get this extended.

pretty sure I figured it out. the workflow ran out of available contacts.

Hi David, I'd recommend using the daysAgo or monthsAgo functions listed below in an advanced expression. This will allow you to select based on a date range that you feel is recent. https://docs.adobe.com/content/help/en/campaign-standard/using/managing-processes-and-data/filtering-data/list-of-functions.html Regards, Craig

Hi David, If your audience was created as a list, then yes you'll need to upload an updated version of the list versus an ad-hoc addition. Regards,Craig

Hello David, As long as you create a text version of your delivery, the only other thing required would be to ensure that the email format preference field on the profile record is set to Text.From there that particular recipient should receive Text emails by default. Regards,Craig

Hi David, Can you be a bit more specific? Is this happening with new or existing workflows? Have you tested from different computers or does anyone else on your end have access and can validate whether or not they are seeing workflows?