Is it Possible to Disable EPM Cloud Passwords from Expiring

This is not possible as it is a violation of password policies,

The only workaround is to enable SSO with their own Identity Provider (IdP) and customer can manage their own password policies.

Please see the documentation for the same below :
https://docs.oracle.com/en/cloud/paas/process-cloud/cprcw/configuring-federated-sso-and-authentication.html

An Enhancement was raised with regard to this and it was rejected.

How is the data size calculated for a EPM Cloud service instance?

The total size of data used by your EPM Cloud service instance is the sum of the following:

• Application data stored in Essbase
• Artifact Snapshot created by the daily maintenance window
• All snapshots that you have exported via EPM Automate or the Migration user interface
• All snapshots that you have uploaded via EPM Automate or the Migration user interface
• All data files that you have uploaded via EPM Automate or the FDMEE user interface

How to overcome Blank page issue during Drill-through via Smartview in EPM Cloud

In EPM Cloud, (PBCS,EPBCS) users might face an issue while doing a drill-through to data management or drill-through to source values.
Users might get a Blank page during the process.

The Smart View extension (add-in) for the browser would have not been installed.

To install the add-ins, refer the steps below

Chrome: 

Download the Smart View for Office extension from the Chrome web store.

Firefox:

Information about the Firefox add-in -
https://docs.oracle.com/applications/smartview/720/SVNST/firefox_extension_100x0867c8ee.htm#SVNST-GUID-DA412821-E7CD-40E4-9CA0-9739D8CAC0D8

For, IE11 - The following settings changes have to be completed -


Go to Tools > Internet Options > General > Tabs

Choose Open links from other programs : The current tab or window