Exchange Online
- Toggle mailbox auditing on by default
- Toggle additional storage providers in OWA
- Disable External Forwarding via Tenant Setting
- Enable Plus Addressing
- Disable TNEF Encoding
- Enable Modern Authentication
- Set deleted items retention period
- Enable Litigation Hold
- Disable Focused Inbox – Tenant Wide
- Set Maximum Message Size – Default Setting for New Mailboxes
- Set Maximum Message Size – Setting for Existing Mailboxes
- Disable Basic Authentication for Exchange Online Protocols – Default Tenant Policy
- Disable SMTP Authentication for Exchange Online – Tenant Wide Setting
- Disable Legacy Email Protocols (POP, IMAP) – Default Setting for New Mailboxes
- Toggle legacy TLS opt-in for SMTP clients
- Disable insecure legacy email protocols (eg SMTP, POP3, IMAP) – Enforce Existing Mailboxes
- Disable insecure legacy email protocols (eg SMTP, POP3, IMAP) – Default Setting for New Mailboxes
- External email warning tag in Outlook
- Send email from alias
- Automatically save sent items in delegator’s mailbox
- Block Sign-in to Shared Mailboxes