Step 1: Open your Outlook and click on the File tab then Options.
Step 2: Click on ‘Advanced’ tab and scroll down to Send and receive option and click on the Send/Receive button.
Step 3: Now the ‘Send/Receive Groups’ window opens, under Setting for group “All Accounts” the send/receive time will be mentioned.
Step 4: It is set to 30 minutes by default and you can change the minutes whatever you want it be.
Step 5: Create new account under ‘Send/Receive Groups’ and follow Step 4 to define new time limits.