May be you need to install Evolution Indicator which can be easily done by dropping the next in a terminal:
sudo apt-get install evolution-indicator
Provide your user password and wait for the installation process to finish, this should take a minute or two.
Then remove the "Indicator applet" from your panel and add it again in order to the panel get the news of the new installed mail indicator.
Reboot your machine.
After rebooting, the "Setup Mail" icon will be in the list of the Indicator Applet icons, clic on it and it will emerge the Evolution Mail client, after which you can set up your mail services and when finished, the evolution indicator will work as we are used to.
Source: How to install evolution and evolution indicator applet in Israel Remix Team