With the news at Microsoft Ignite that Teams is here to stay, and going to be the primary collaboration client in Office 365, it is going to be important for organisations to understand how to secure the data and conversations stored within Microsoft Teams.
Where is the data?
The first key thing to understand what types of data you are talking about, and where it is actually stored. Every “Team” is build on an Office 365 Group, and this is where the majority of the Team related data will be stored. Each Channel in the Team will provision a new folder in the Group’s Document Library, and this is where files shared in Group conversations will be stored. Each Group also has a Group Mailbox, and this is where conversations held within channels are stored.
However, users can also communicate directly via chat, and share files from this interface. In this instance, the conversations will be stored in the user’s mailbox, and the files they share will be stored in OneDrive.
That’s great, but what does this mean when it comes to compliance?
Teams Conversation Data
As I mentioned above, the conversations from Teams Channels is stored within the Group Mailbox. If your organisation has a requirement to remove this data after a certain period, Microsoft will soon be releasing Retention Policies for Microsoft Teams which will allow you to remove content after a specified period, and this can be customised for different Teams.
For eDiscovery, you can use the existing capabilities within the Security and Compliance Center to create an eDiscovery search on the Group Mailbox where the chat data is stored in a hidden folder, and optionally place this data on hold. To do this, use the IM content type as you would historically have done to search for Skype for Business conversation content.
Teams File Data
In a similar manor to conversations, as all Teams files are stored within the Groups SharePoint Team Sites, then you should apply the same practices for these files as you would for any other SharePoint sites.
So a standard Retention Policy would be applied and filtered down to your Office 365 Group sites, and eDiscovery search on the same.
What if I need to secure all data in a Team, whether it’s chat or files?
Simple! Set up an eDiscovery case for the specific content you are looking to protect and put both the SharePoint sites and IM conversations for the Group into the scope for the case. This way, you can have a single point of reference for all of your content referencing the case in question.
Mike Parker blog post