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Search engines are indexing both https://mail.satechhelp.co.za and http://satechhelp.co.za i believe that this is one the reasons fo duplicate content.
Q2A version: 1.8.2

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Create robots.txt file in dir of site mail.satechhelp.co.za. Put below lines in it. search engine will not index then.

https://mail.satechhelp.co.za/robots.txt

User-agent: *
Disallow: /

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