I installed Sitecore ECM by using the installation guide (https://sdn.sitecore.net/Products/ECM/ECM%202,-d-,2/Installation.aspx).
This is what I did:
After completing these steps, I can see installed rendering items, templates, modules in System, and sample items in Content. However, I can't find any listed "E-mail Campaign" link for Email Campaign Manager in Sitecore start button.
We disabled Analytics feature temporary now, but I don't think it affects this issue. We are using Sitecore 8.0
ECM 2.2 is not compatible with Sitecore 8.0.
Use ExM 3.0 or ExM 3.1 and always follow compatibility table.
And one more remark: ExM starting from 3.0 depends on List Manager which depends on contacts which depend on Analytics.