Hi Benjamin,
I guess it would help to understand why exactly you need to increase the maximum amount of modes in SAP WebGUI?
What exactly is being done here with the WEBGUI service? What transaction/s is being called?
Are you trying to restrict the amount of WEBGUI sessions that a user can logon too?
This is not possile. See the note
314568 SAP GUI for HTML functionality / Limitations / Sp. Behaviour
"
- Multiple Sessions and Inter Mode Communication (IMC)
SAP GUI for HTML doesn't support multiple sessions
and IMC. Users can only work within a single session. When a user tries to
create a second session, the system responds with the message " Maximum number
of sessions reached". If users want to work in multiple sessions they have to do
multiple logins.
"
Also another useful note
>12466 Logon restrictions in R/3
Regards,
Oisin