I have a site network that I originally build on http. I used subdomains to developp the sites and then when ready I set a domain with https using the domain mapping plugin. Actually I have some problems now because of passing the sites from http to https.
Today there is Let's encrypt solution for setting https for everysubdomains so if I set such a solution today for sur I will begin setting everything in HTTPS and would not have any problem.
But this is an existing websites network and I want to migrate it to https.
What procedure do you recommand today to migrate the site network it self to https (not the mapped domain that is easy with domainmapping plugin.) ?
To be precise as 2nd question : what I have today is that I have notice for mixed content that briefly appear when page are loading. If I display the console I see that it came from a JS that comes from domainmapping plugin : the js load from the main network site without https. http://NETWORKMAINSITE.COM/dm-sso-endpoint/1482060552/?dm_action=domainmap-check-login-status&domain=MAPPEDDOMAIN