We need to migrate approx 120 of our users to an exchange system as their division is leaving the company. We do not need any co-existance and want to make this as non invasive as possible.

The new company's it folk are suggesting that we use the API but I'm not keen.

We have GW 7.0.1 but i've not been told what version of exchange they have. We also have local GW archives to be considered. We don't have AD and I'm not sure our network guys will want their stuff on out network either.

Any suggestions would be gratefully accepted.