Pre-sales advice using Outlook on a Mac and accessing emails when no internet

Hi,

I am looking for pre-sales advice about moving Outlook from a large Windows 10 desktop to Mac, which I use for storing all emails for the past 15 years related to my business.

I phoned Apple support and was told that there was nobody who could give me advice about using Outlook on a Mac.  I guess he was just a poorly trained support person that I got through to.

I use a Windows desktop and a Windows laptop that has a mirror copy of all files, including Outlook 365 using local PST files on both machines.

I plan to buy a Mac Studio a Mac Book Pro and to move everything over to Mac, and the main reason is to help with video editing. 

When I use Outlook on one machine, it synchs those files with the other.

I have over 150 folders within Outlook and the main pst file is 6 Gb in size, with an archive pst file that is 25 GB in size. 

Someone told me recently that it is not possible to use Outlook with local pst files on a Mac.

Having local pst files is very useful because I can prepare emails or access old emails when I don’t have access to the internet.

Looking forward to hearing advice from anybody who has used Outlook on a Mac and who knows more about whether it is possible to someone access emails when no internet connection.

Thanks in advance,

Dave