In the documentation it states:

"To allow end users to access their information from the Web PIM,
go to User Settings >Email Accelerator > Email Accelerator User.
Click 'Setting: Default' and then click Edit. From the Settings
tab, select the 'Enable PIM functionality on the Web' option."

However, within the Linux version, there is no "Email Accelerator"
tab/option, so how do we do this?

Also, it seems this has been BETA for a very long time now, any updates
with this is going to be officially released?