A sitemap is an index of all pages on your directory. A sitemap may assist in search engines finding pages on your site that normal indexing may not be able to locate.
1-) Get your domain verified by following these instructions: http://support.edirectory.com/customer/en/portal/articles/2884266-how-to-verify-my-domain-on-google-?b_id=7909
2-) Go to your Site Manager. Then go to Promote > SEO Center. Then click the Sitemap Index button.
3-) Select and copy the part of the URL where it says: custom/domain_1/sitemap/index.xml
4-) Go to your Google Search Console property and click Sitemaps from the menu on the left.
5-) Paste it to where it says Add a new sitemap and click the Submit button.
6-) If it returns a "Couldn't fetch" error just refresh the page and try again. If it returns any other error, please contact the support team via email: firstname.lastname@example.org