Hi there, I too have mapped domains and trying to keep the www on each domain by making a change to the htaccess file.
I have tried adding each domain www redirect to the htaccess as suggested above but when I visit the site it says there is a redirect loop.
Can someone please help.
RewriteEngine On
# www redirect
RewriteCond %{HTTP_HOST} ^domain1.com
RewriteRule ^(.*)$ https://www.domain1.com/$1 [R=301,L]
RewriteCond %{HTTP_HOST} ^domain2.com
RewriteRule ^(.*)$ https://www.domain2.com/$1 [R=301,L]
RewriteBase /
RewriteRule ^index\.php$ - [L]
# uploaded files
RewriteRule ^files/(.+) wp-includes/ms-files.php?file=$1 [L]
RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^ - [L]
RewriteRule . index.php [L]
