I can't send e-mail messages with large attachments in Outlook for Mac

Administrators can set a limit on the size of the files that you are able to send from your Microsoft Exchange accountAn account managed by Microsoft Exchange Server. Microsoft Exchange accounts are used by organizations with many users. They make it possible to synchronize e‑mail, calendars, and contacts between multiple computers.. Limiting attachment size helps the system maintain performance and stability. If your company policy allows, the administrator can increase the maximum allowable size of attachments.