How do I change the time interval that Outlook automatically checks or sends email?
Open your Outlook calendar.
Go to Tools > Options then Mail Setup tab and choose Send/Receive. Under "Setting for group all accounts", change to the time desired under "Schedule an automatic send/receive every xx minutes".

Go to Tools > Options then Mail Setup tab and choose Send/Receive. Under "Setting for group all accounts", change to the time desired under "Schedule an automatic send/receive every xx minutes".

Updated on: 24/12/2020
Thank you!