- Was the subscription synchronized with the service plan?
- Have at least n days passed since the subscription was activated (with n = number of days entered into the "expiration" field)?
You can test the feature by setting a short expiration time in the customization section of a subscription.
Yes I have 140 domains, I made the Expiration date for One Year and Update & Sync for all subscriptions after that I checked the subscriptions Manually and I see the
Renewal date: —
I am not sure if this is "by design" or a bug. There was a discussion several years ago on the renewal date where Plesk team wanted the renewal date to not be reset when the service plan is changed for some specific reason.