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Durham University

Computing and Information Services

Frequently Asked Questions

+What are the Office 365 mailbox quota limits?

The Office 365 quota limits are as follows:

Mailbox limit - 50GB
Maximum number of message recients per day - 1500
Maximum number of recipients per message - 500
Maximum size of attachment - 25MB

Despite the large mailbox quotas on Office 365, you should proactively manage your email, for example:
By emptying your deleted items folder regularly.
By sorting through Mail folders (including Sent Mail) and deleting any messages no longer required.

Categories: Office 365