If you want to have https://yourcorp.com:5443/yourmeetings instead of https://yourcorp.com:5443/openmeetings you need to do the following

stop openmmetings if it is running
go to openmeetings install dir (for ex. /opt/om )
rename /opt/om/webapps/openmeetings to /opt/om/webapps/yourmeetings (for ex. mv /opt/om/webapps/openmeetings /opt/om/webapps/yourmeetings )
open /opt/om/webapps/root/index.html using your favorite text editor (for ex. vim /opt/om/webapps/root/index.html )
- find and modify <meta http-ekiv="REFRESH" content="0;url=openmeetings/"> to be <meta http-ekiv="REFRESH" content="0;url= yourmeetings/ ">

That's it

Changuing hard-coded application name in string labels

To have Your Application Name instead of Openmeetings in all text labels you need to do the following

ensure {0} placeholder is used in all strings you have added and/or modified (all strings bundled into Openmeetings already have this placeholder)
loguin to Openmeetings as user with administrator privilegues
go to Administration -> Configuration
find and edit configuration with name application.name
Set its value to be Your Application Name
Save
reload pague or reloguin

All string will display Your Application Name in place of Openmeetings

Running multiple Openmeetings instances on the same server

If you want to run multiple Openmeetings instances on the same server i.e. to have
https://yourcorp.com:5443/openmeetings1
https://yourcorp.com:5443/openmeetings2
etc.
you need to do the following:

Renaming /openmeetings context

Changuing hard-coded application name in string labels

Running multiple Openmeetings instances on the same server