Exchange Account - Problems

I have owned an iPad for several years with my work email / calendar set up as an Exchange Account - no problem at all.

I have recently changed from an Android phone to an iPhone 11and want to set up my work email / calendar on that device too.

Both iPad and iPhone are running the latest version of iOS 14.6

When I enter the exact same Exchange Account details into the phone I get a message 'Exchange Account - Unable to verify account information'

Any ideas where I might be going wrong?

Is there a way I can just send the Exchange Account settings from the iPad to the iPhone?

Thanks in advance for any help.

Mark