Microsoft outlook updating cached messages
It also provides the same functionality in Microsoft accounts specifically in these domains: Hotmail.com, Live.com, MSN.com, Outlook.com, and
Start migrating your app to use Outlook REST API in v1.0 of Microsoft Graph. The Outlook Mail API lets you read, create, and send messages and attachments, view and respond to event messages, and manage folders that are secured by Azure Active Directory in Office 365.Outlook 2016 applies the sync setting to shared or delegate folders and mailboxes, and public folders that are cached.It does not apply the sync settings to the new Groups feature as Groups are cached in in a separate data file (account-name.nst).You can use the following well-known folder names instead of the ID to specify the corresponding folder: .Get folders | Synchronize folders | Create folders | Update folders | Delete folders | Move or copy folders See also: REST API message resource | REST API Folder resource Like other Outlook REST API, for every request to the Mail API, you should include a valid access token.
Users who need to limit the amount of data cached locally can set up filters on each folder.