I've been issued a new computer at work and need to transfer e-book from old to new. The e-book is for a course that I'm doing. I can't seem to find instructions for doing this. I've authorised both computers but in the process of authorising the second computer I had to reset my password. Thanks.
There is no automated help from Adobe or others on this.
As long as you have used the same AdobeID to authorize both computers, all should be fine.
It's the underlying ID that matters, and changing the password does not change that.
Also note that there is no automated help for backup either.
Neither Adobe nor the publishers guarantees a copy of you books somewhere in there servers.
Make sure you have a safe backup of all your DRM .epub files in case of computer failure.