New member so apologies if this is in the wrong place. I have a client who has a Wordpress Multisite installation (www.companyname.co.uk). companyname.co.uk is the main domain and protected by a Lets Encrypt cert, he also over 160 townservice domain names (e.g. swindoneservicename.co.uk) which are mapped to the Wordpress multisite install. I’ve added the service domains to the Plesk control panel as domain aliases. All great, add the SSL cert to the aliases and all works fine. Only thing is, when i get to a certain amount, I get the following error:
Invalid response from https://acme-v01.api.letsencrypt.org/acme/new-cert.
Detail: Error creating new cert :: CSR contains more than 100 DNS names
I understand from doing a search for this that you can only have 100 names per certificate. Does anyone know how I can secure all the townservice.co.uk domain names using either 1 certificate or multiple certificate? I have installed a wildcard SSL cert from GeoTrust, but it only covers *.companyname.co.uk. The WP MS is setup as sub domains (town.companyname.co.uk).
Thanks in advanced for any assistance.