Calendar Browser Registration Again

I register Calendar Browser successfully, but then it asks for a registration again.

If the license information is not kept once a registration is done successfully, it implies that the user performing the registration does not have enough permissions over the Calendar Browser Outlook folder to save the license information back to the setting item.

Make sure you have Owner’s right over the root Calendar Browserfolder in Outlook when performing the registration. This way the registration will be done for all users of Calendar Browser.