Hello @Said Hragua
Welcome to the Atlassian community.
This is a user community. We are customers and user of the Confluence product, just like you.
You will need to contact the owners/administrators of the Confluence instance you are trying to access to get assistance. If you aren't sure who to contact start with the people who told you to access this system. Since you're email domain is the same as the system I assume that your company is the owner of the system, so you could also try contacting your company's internal technical support team.
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