Few issue list After upgrade EHP4 to EHP7
1. Session Issue
if its common system the portal application showing last login user's details in portal even though logged in with different user.
System Administration→System LandScape→System LandScape Overview→Your System Alias→Configure →Enable ABAP HTTP Security Sessions Enabled in portal
Activate the Logoff service in SICF tcode in path
sap → public→ bc→icf→
2. Travel Management
Existing Travel Management Application in JAVA, in EHP7 it is mandatory to change it to WDA Application.
"The Employee Self Service application of travel management you want to use is outdated"
3. Export to Spreadsheet(SAP List Viewer).
This option names is changed to Text with Tabs
Refer Note: 1990737 - "Text with Tabs" export format in download list
4. Company Code issue.
it is due to new Auth. Object Check
You don't have Authorization for Company Code XXXX
Provide necessary Authorization to the user Auth Obj F_BKPF_BUK
5. Portal Rendering (Transaction Iview alignment) issue in IE11.
implemented 1970427 - SAP GUI for HTML: Rendering problems in Enterprise Portal (EP)