I was to reset my mac book-2018 (Mac-OS Mojave 16GB + 500GB-SSD. So I exported "on my computer folder as .olm file which is about 100+ GB, so that later on I can access my downloaded emails". Now, its taking about one week to import the .olm file into outlook 2019 for mac.
After googling I only found some paid software solutions. is there any effective solution for the said issue?