I am working on an application that would do auto-responses for our users while they are away on vacation or while we are testing federation. I would like to create a server-side application that could log in and update their presence status as well as act as a bot for them, however - for obvious security reasons - I don't want to have to store their passwords in a database so that the application can log in as them. I have looked around a bit but haven't found any reference to doing something like this with a service account, similar to the way exchange allows send-as/receive-as rights to another account.
Is this possible? If anyone has any other ideas, I would definitely be interested.
Thank you!
-Patrick