Hi Temidayo,
To troubleshoot the issue, I would like you to check the requirement for the directory synchronization computer first.
1. 64-bit edition of Windows Server 2012 Standard or Datacenter.
2. It must be joined to Active Directory.
3. It must be located in an access-controlled environment.
4. You can only install one computer running the Directory Sync tool between an on-premises Active Directory and an Office 365 tenant.
For details, you can refer to http://technet.microsoft.com/en-us/library/jj151831.aspx
Thanks,
Johnny Zhang