[Exim4U] Convert cleartext passwords to SHA512 crypt

I am migrating about 250 users to a system where I'd like to use SHA512 crypt as the standard. I have been using the old versions of exim4u which still has the cleatext password field. What is the easiest way to change (in place) all the crypt field to SHA512 crypt, based on the cleartext passwords? -- Best regards, Odhiambo WASHINGTON, Nairobi,KE +254 7 3200 0004/+254 7 2274 3223 "Oh, the cruft.", grep ^[^#] :-)