Exchange Online service description - Service Descriptions
https://learn.microsoft.com/en-us/office365/servicedescriptions/exchange-online-service-description/exchange-online-service-description
WEBFeb 14, 2024 · Storage and recipient limits for Exchange Online: For information about the storage and recipient limits available in the Exchange Online subscription plans, see Exchange Online limits. Messaging: To stay informed of upcoming changes, including new and changed features, planned maintenance, or other important announcements, visit …
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