[Plugin: WordPress MU Domain Mapping] Maintain WWW prefix in domains

Hello,

I’m migrating several WP 3 blogs to a unique multisite installation using the “WordPress MU Domain Mapping plugin”.

https://www.ads-software.com/extend/plugins/wordpress-mu-domain-mapping/

I have followed these instructions:

https://codex.www.ads-software.com/Migrating_Multiple_Blogs_into_WordPress_3.0_Multisite

Everything seems to work fine, except for the detail that I need to maintain the WWW prefix in all domains (domains without www are working fine). All my sites are aged and always have used the www prefix.

Here there is a closed post with a solution:

https://www.ads-software.com/support/topic/206285?replies=7

I wouldn’t prefer not to touch or modify the plugin code, as I want to benefit from futures upgrades.

Is there a solution using only the htaccess file in root folder?

That would be amazing!!

Thank you!!