New 24 inch iMac next week

I expect to receive me new 24 inch iMac next week and have 3 current carbon copy clones (10.14.6) on separate SSDs. I expect my new mac will have Big Sur as it’s OS, I feel confident in migrating my personal data, with the exception of my years of MS Outlook emails and attachments. I would appreciate any assistance anyone is prepare to offer to ensure all the data in outlook comes over to my new M1 imac.
thank you in advance, Cheers holtynq in Oz.

Migration assistant should work fine…but you could test it by booting one of your clones and updating it to Big Sur…then test for working Outlook. The test volume could be left as is or erased and cloned back to Mohave if needed.