Information security and data breaches are a hot topic at the moment, there seems to be a constant stream of data breaches and vulnerabilities in different products being exploited on a daily basis. One topic that was brought up in the last few weeks has been Address Book data https://www.wired.com/2016/09/people-please-dont-store-private-data-address-book/ . Address books can be the proverbial open window on the house with bars on door and maybe not something that is commonly thought about. If you want to detect if people are using Address book to store confidential information it can be a challenge because this data isn't searchable via a conventional eDiscovery type search. But this is where a scripted enumeration and filtering approach can do the job. I posted a Contacts Powershell module that consolidated a lot of EWS contacts function into one script last year so for this post I've extended this to include a Search that will enumerate all the contacts in a Mailbox...
Pushing the Envelope in Messaging and Office 365 Development