Setting Custom Recipient Limits for Exchange Online Mailboxes

 

Exchange Online now supports a custom recipient limit for mailboxes of between 1 and 1000. The limit controls the maximum number of recipients a mailbox can add to a message. Think of the fun you could have by setting the recipient limit on manager mailboxes to something small, like 6….

 

https://office365itpros.com/2020/01/17/custom-recipient-limits-exchange-online-mailboxes/