I have now found the settings that allow me to add the folders so they are available offline. Have to do this for each folder in turn and they only seemed to sync for the first time, when I closed Outlook. However they are now present in offline mode

Still testing whether send and receive works.

Oh, that offline/online!

As I said in previous replies, I knew your problem sounded too simple, and I don't know anything about Exchange.

I'm sorry I couldn't be more helpful. Good luck!

My work around appears to be work now. Send and receive runs once every 90 minutes.

Interestingly, now that I had gone off line, every time I start it asks me if I wish to go online. Once I go online, it still asks me next time I start up if I wish to go online. I cannot find an option to change this behavior. Yet more rubbish software design from Microsoft.

If it was a Mac I was using at work and I was using Mail, then I could just use an add on which would do a far better job than anything I've ever come across from Microsoft and their Outlook software.

However Mail has other problems all of it's own, so I no longer use Mail at home and couldn't be certain it would scale well in a multi-user mail server type environment, in which the company I work for operates. I reverted to using Thundebird at home, which to be fair isn't that great either for my needs but what I'm using for now.