To show that the companies are now merged, one of the most common practices is to use “one company, one email”. That way everyone can see that the companies have merged. But we also need to know how many computers they are currently using as well as how many servers, both physical and virtual. This will allow us to assess the combined strength of their IT infrastructure. We also need to know what version of Windows Server they are using as well as what Exchange server that they are using, that will help us establish how we can migrate all the information to one server for the new company to access the combined information. This will also allow us to establish domain trust for both networks that way both companies can access and share information between all the users. We can use the Active Directory Migration Tool to help with the merger of information. The ADMT will allow us to migrate users, computers, and groups from one domain to another domain. Since we are using an Exchange Server we need the information for the other company so we can use the Inter-Organization Replication Tool to replicate all of the information between the exchange servers so they both have all of the information, emails and anything that has been sent. This will also allow the coordination of meetings, appointments, contacts and all public folders to share access. If one or more domain exist, as in a merger, you can combine the multiple domains into a hierarchical tree structure. If one company is using its own dedicated DNS server this is the best possible solution. We also need all of the afore mentioned information so we can set up a DNS forwarding solution. This will help to improve the efficiency of name resolutions for the computers on your network.