The value for the 'Disable Session Limit' registry entry is set to '{1}' on server '{0}'. This may cause excessive memory ...

The value for the 'Disable Session Limit' registry entry is set to '{1}' on server '{0}'. This may cause excessive memory usage by MAPI clients on the server. You can configure the 'Maximum Allowed Sessions Per User' registry entry instead.  Click on the link 'get help fixing this issue' in the actions pane located on the right side of the screen for assistance.