To fix this most irritating Microsoft Outlook problem, follow the list of easy step given below –
Step 1: Simply select the Windows ‘Start‘ button and then click ‘All Programs‘. Click ‘Internet Explorer‘ to open the browser. After it reveals, select the ‘Tools‘ menu item and then click ‘Internet Options‘. This reveals a configuration window.
Step 2: Simply select the ‘Security‘ tab. In this screen, click ‘Custom Level‘ to start a new screen. Search down to the area marked ‘Scripting‘.
Step 3: Click ‘Enable‘ for each scripting component you want to allow to run in the Outlook client. Click ‘OK‘ to save your settings.
Step 4: Click ‘OK‘ again in the main settings window to save your configurations. You must reboot Outlook for the new configurations to take impact. When using Microsoft Outlook, you may come across a number of different error messages like server error 421; it means that the Internet Email Service has reached the most of incoming connection it can take at once.
I hope it will be helpful.
Also find here how to add social media in Outlook 2010.