
As there is no idea of subscriptions in the Web Admin and App editions, occasionally a domain will send out subscription expiration notices ~90 days after creation.
The remedy used is to set the expiration date to none, using the following command:
#plesk db "update Limits set value='-1' where limit_name='expiration'"
Prior
root@server:/usr/local/psa/bin# ./domain -i yourdomain.com
General
=============================
Domain name: yourdomain.com
Owner's contact name: Admin User (admin)
Domain status: OK
Creation date: Feb 13, 2015
Expiration Date: May 7, 2015
Domain administrator: No
Disk space limit: 10.0 GB
Size: 764 MB
Total size of backup files in local repository:0 B
Traffic limit: 100 GB
Traffic: 11.9 MB/Month
After
root@server:/usr/local/psa/bin# ./domain -i yourdomain.com
General
=============================
Domain name: yourdomain.com
Owner's contact name: Admin User (admin)
Domain status: OK
Creation date: Feb 13, 2015
Expiration date: Unlimited
Domain administrator: No
Disk space limit: 10.0 GB
Size: 764 MB
Total size of backup files in local repository:0 B
Traffic limit: 100 GB
Traffic: 11.9 MB/Month