{"id":99430,"date":"2016-06-08T14:01:44","date_gmt":"2016-06-08T18:01:44","guid":{"rendered":"http:\/\/www.bu.edu\/tech\/?page_id=99430"},"modified":"2025-12-12T22:42:46","modified_gmt":"2025-12-13T03:42:46","slug":"limits","status":"publish","type":"page","link":"https:\/\/www.bu.edu\/tech\/services\/cccs\/email\/bu-email\/office-365-outlook\/limits\/","title":{"rendered":"Message Size, Retention Limits, and Recovery"},"content":{"rendered":"

Size and Retention Limits<\/strong><\/h2>\n

Information on Exchange Online limits is provided by Microsoft<\/a> and summarized below.<\/p>\n\n\n\n<\/colgroup>\n\n\n\n\n\n\n\n\n\n\n\n\n
Feature<\/strong><\/td>\nOffice 365<\/strong><\/td>\n<\/tr>\n
User Mailbox<\/td>\n50 GB<\/td>\n<\/tr>\n
Message size limit (including attachments)<\/td>\n100 MB<\/td>\n<\/tr>\n
OWA<\/a>\/Outlook for Mac File attachment size limit<\/td>\n25\/35 MB<\/td>\n<\/tr>\n
Recipient limit<\/td>\n500 recipients<\/td>\n<\/tr>\n
Deleted Items folder retention<\/td>\nNo Limit<\/td>\n<\/tr>\n
Junk email folder retention<\/td>\n30 days<\/td>\n<\/tr>\n
Retention after trash is emptied<\/td>\n14 \u00a0days<\/td>\n<\/tr>\n
Mailbox Backup<\/td>\nReplicated 4x in cloud<\/td>\n<\/tr>\n
Disaster Recovery of mailboxes<\/td>\nMailboxes will remain accessible in the cloud<\/td>\n<\/tr>\n
Sending Limits<\/td>\nIndividual mailboxes are configured for typical use. Please use Broadcast Email<\/a> for large lists<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

Need to recover <\/strong>deleted items in Outlook 2016 or Outlook for Microsoft 365 (Windows and Mac)<\/strong>?<\/strong><\/h2>\n

When you accidentally delete an item from your Outlook mailbox, you can often recover it. The first place to look is the Deleted Items<\/strong> folder.<\/p>\n

\"Screenshot<\/p>\n

Search for the item you want, right-click it, and then\u00a0select Move<\/strong> > Other Folder<\/strong>. If you can’t find the item\u00a0there, follow the steps in the next section\u00a0to recover deleted email messages, appointments, events, contacts, and tasks that have been removed from the Deleted Items<\/strong> folder.<\/p>\n

How to recover an item that’s no longer in your Deleted Items folder:<\/strong><\/h3>\n

If you can’t find an item in the Deleted Items<\/strong> folder, the next place to look is the Recover Deleted Items<\/strong> folder. This is the place where items are moved when you do one of the following things:<\/p>\n