I've want to organize all the content of multiple domains from one Wordpress back-end. Today I'd found the plug-in MU Domain Mapping from what I understand it redirects subdomains / folders to the domain with a 301.

Does this affect Google rankings? Can I edit all the content from one back-end? Some experiences or other suggestions to manage content from multiple domains from one back-end?

Also is there a limitation on how many domains can be in a network? Or do this completely depends on the server? What do I need if I would like to use around 20 domains? Many traffic, or big storage?

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    That plugin is now obsolete; all you need to do is set up mutisite and edit the URLs for the sites in your network. The scaling question is dependent on the size/complexity/traffic, etc. of the network sites. I'm going to guess that moving existing separate WP installs into a consolidated multisite is not going to be an easy task... – C C Aug 17 '16 at 14:11
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    @CC is absolutely right. The plugin is obsolete for these past couple years. Howto: Domain Mapping without a Plugin - Instructions. – Max Yudin Aug 17 '16 at 14:23
  • Those instructions are good. To take them to the next level you'd use Amazon Route 53 as the DNS; you can set up alias pointers to your root mutisite, never have to worry about a static IP address and also give your clients a "white label" set of DNS names so they never have to worry about screwing around with updating A or CNAME recs at their registrar. It really is a slick solution. I believe you can also do similar with CloudFlare. – C C Aug 17 '16 at 14:30
  • @CC correct me if I'm wrong, but you say this plug-in is deprecated and Wordpress does support this out-of-the-box? Because when I'll add a new site in my network management I can only add subdomains. Where can I change the URL? I can't find anything about this, any good tutorials? – ronnyrr Aug 17 '16 at 15:21
  • take a look at the link Max cited. – C C Aug 17 '16 at 15:36

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