Password expiration - is there any impact on calendar delegation/access?

If person A were to actually "delegate" by granting person B access to their mail file then there is no real impact. Each person will have password expiration that they need to manage and what they access is irrelevant. There is no password expiration assigned to a "mail file" anymore than it may be assigned to a database. Password expiration applies to an individual user ID file.

However, If person A were to give person B a copy of their ID file and tell them their password (not a suggested best practice but it does happen) then things become quite complicated. The suggested solution would be for the owner of the ID file to be responsible for changing their password and then every copy of that ID file would need to have the password changed to the exact same thing.