Customization Recipient Limits in Microsoft 365 The total number of recipients added to the To, CC and BCC lines of the message. By default, in the Microsoft 365 Multi-Tenant service, it is set to 500 for all mailboxes, and customers cannot change this setting before January 2020. Some email admins want to increase the recipient limit for some mailboxes - for example, to support recurring mailing details such as recurring mail billing details. while others want to reduce the recipient limit, to 50 or 20, such as rogue There is a way to better protect against rogue employees such as spam or hacked email accounts. Exchange Online Security Service, features to help detect misuse of an already rogue employee or hacked email account, can be customization by the recipient email recipient, another option that includes access protected Can be used as a strategy - strategy to help improve security. Your institution's currency. Microsoft 365 tenant adminis...