Sync Exchange contacts with icloud

[davidra]

I have looked at tons of articles and still can't find the answer to this question. I have an Exchange account at work; I am retired and although I still have the account, I'd like to move my thousand or so contacts to iCloud. The Exchange server at work (it's a huge health care complex) is frequently down for a variety of reasons, and I'd like to be able to access contacts when that happens. For example, this morning the Exchange server was down and all my text messages did not identify the messages by name, only by phone number, because those contacts were on the Exchange server. I also have Outlook on my Mac. Can I export all my contacts to an OLM file (apparently I can and save it on the mac)? Then what can I do with that OLM file containing the contacts to get them onto iCloud? Even if it's a one-time thing, that's fine, since I rarely use the Exchange server any more for contacts.