Hi

after searching the forum and trying all of the methods posted
I found this one that worked for me.

https://support.office.com/en-us/art...9-c9dbcf0bdb1d

Using the section under.
Add the new account to your unsupported version of Outlook 2007


Although I don't know why my version is not supported, it is the latest and fully updated.

Cheers

savey